But, in fairness, I really am making a point for ALL sports, not just the WTA. Like I said in the OP, it does seem to me that ATP commentators are even MORE fickle and subscribe to the illogical "this era is so much better than previous ones", to the extent that I've genuinely seen on Men'stennisforums people saying Peak Sampras and Agassi would have no chance against Murray
And just to expand on the point I was making in the OP -- I'm pretty sure that there'll be many posters on TF in 10 years' time, and many commentators in the tennis media, who WILL be saying that the new generation will be better than the Williams/Belgians/Sharapova era, on the basis of nothing whatsoever, and I'm sure many of the people who are currently huge tennis fans would be amazed by it.
I agree with you that when ANYONE starts introducing entirely subjective criteria and assumptions (such as "the game is so much stronger/has more depth than back then") -- which is why imo GOAT debates have to rest entirely on quantifiable achievements.
Sorry, but look at the other thread -- many people HAVE been saying Serena is better, that Peak Graf would have no chance against Peak Serena, etc, using the "the game has evolved" logic.