The standard defence of pay differences in professional sport is a revenue argument. Athletes are paid from what their sport generates; women's competitions generate less; the difference is therefore a market outcome rather than a decision.
The revenue premise is largely accurate. The inference from it is where the argument becomes weak, because it treats revenue as an independent input when it is substantially an output of prior decisions.
The circularity
Audience for a sporting competition is not a natural constant. It depends on whether the competition is broadcast, at what time, on which channel, with what production quality, promoted by whom, and for how many years.
Every one of those is a decision made in advance of the audience appearing, and every one of them has historically been made less favourably for women's competitions.
So the sequence runs: lower investment, less coverage, worse scheduling, smaller audience, lower revenue — and then the revenue figure is cited as justification for the original investment decision.
This is not a claim that audiences would necessarily be equal under equal investment. It is the narrower observation that the comparison being made is not between two products competing on equal terms.
What the coverage data shows
Longitudinal studies of sports media coverage have found women's sport receiving a small fraction of total coverage, with figures in the range of a few per cent commonly reported across decades of analysis in several countries.
The gap in coverage has been consistently larger than the gap in participation, which is the relevant comparison if coverage were tracking interest.
Analyses have also found differences in production quality — camera positions, replay availability, commentary quality, graphics — which affect viewing experience and are entirely upstream of audience.
Where investment has been tested
Several natural experiments have occurred in the last decade, and they are more informative than any amount of argument.
Where major broadcasters have acquired rights to women's competitions, promoted them substantially, and scheduled them at reasonable times, audiences have in several cases grown rapidly from a low base. Attendance records in several sports have been broken repeatedly during the same period.
These growth figures are frequently cited in a misleading way — growth from a very small base produces large percentages — but the absolute numbers in several competitions have also become substantial in a short period.
The most defensible reading is that latent demand existed at a level well above what the prior investment implied, which is what one would expect if the audience had been partly constrained by availability.
The tennis comparison
Tennis is the most-cited case because equal prize money at the major tournaments was implemented over an extended period, allowing observation of what followed.
What followed was not a collapse in interest and was not a demonstration that the women's game generates identical revenue. The arguments about relative revenue continue.
What it did demonstrate is that a governing body can make a distributional decision, and that the decision is a decision. Prize money at those events is not mechanically determined by attributable revenue — it never was for either draw, given how tournament revenue is generated jointly.
That is the useful lesson: where revenue is generated by a combined event, its allocation between participants is a policy choice being presented as an accounting fact.
What the honest version of the pay argument would look like
It would separate three questions that are usually merged.
Is the revenue currently lower? Generally yes, substantially, in most sports.
Is that difference a fixed property of the product? Unclear, and the recent evidence suggests it is at least partly a property of investment and distribution.
Is the current allocation the only defensible one given the revenue? No — governing bodies routinely cross-subsidise between formats, age groups and disciplines, and do so without controversy in other contexts.
Once separated, the argument is no longer about whether markets are fair. It is about which cross-subsidies an organisation chooses to make, which is a normal question about priorities.
The part that is not about elite sport at all
Very few people are professional athletes, and the direct material stake in prize money is tiny.
The stake that is not tiny is visibility. Studies of participation consistently find that visible competition affects the perceived availability of a pathway, and children's stated aspirations track what they see.
A sport that is not broadcast does not exist as a career for a nine-year-old, and does not exist as an ordinary Saturday activity for her parents either.
That is the strongest argument for treating coverage as an investment rather than a reward, and it does not require winning the revenue argument at all.