Best vs Best is a piss poor analysis of how a market generally performs. The difference in income between the majority of indie games on steam and the top 1% is staggering.
Numbers are easy to find via:
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Compare games tagged "Indie." Average Revenue: ~210,000$, Median Revenue: ~760$. That suggests that most indie games barely sell at all and that the average is massively dragged up by a small number of high-performing games.
Compare games tagged "Hentai." Average Revenue: ~100,000$, Median Revenue: ~2,600$. The average is 1/2 of Indie but the median is over 3x higher than for Indie. The lower difference between the Average and Median suggests that these games are performing better CONSISTENTLY.
A big part of this is how overly saturated the indie market is, there are 25x more games tagged indie than hentai. All that really means though is that it is a lucrative niche and you are much more likely to make a return in that market right now. How those numbers will look in the future as the eroge market grows remains to be seen.
It is true that nsfw games don't have the multimillion-dollar hits that the general market has, but if you're comparing who is doing better overall then nsfw wins. What you're saying is like saying "South Africa is doing better than Sweden economically because Elon Musk is richer than the richest Swede." All while ignoring that the average South African makes less than a quarter of what the average Swede does.