Seles was vastly overrated and proved she was incompetent at Wimbledon. She was no GOAT in the making (no Grand Slam, no GOAT status), or on the path to being the best of her generation. Since her biggest cheerleaders love playing hypotheticals, one can see how Seles--sans stabbing--was going to still fall behind Graf and even as Graf's career was coming to a close, another generation would soon rise which would wipe the courts with her, once they entered their majors-winning form.
Even at 2 majors per year, let alone the possibility of 3 or 4 per year, Seles would be on 15 majors after the 1996 US Open, age 22. At 3 majors per year, that would be 19 majors.
The likelihood of Seles winning just 1 more major after the 1993 Australian Open is not exactly likely pre-stabbing (especially given her enthusiasm for tennis, and her form), having won 8 majors at age 19, and being denied the chance of possibly winning 3 more majors as a teenager.
That's funny, because I wasn't really watching tennis for a while in the 00's, but I always used to tell people that I preferred women's tennis to men's, because the men were overpowering the courts. (I actually feel that way right now about volleyball, where women's volleyball is a much better watch). Indeed, watching those old women's matches from the '90's is so much better than what we see today in the WTA.
I honestly think that a lot of the female players got distracted by off-court stuff around the mid 2000s, i.e. they were now doing better business off-court than on-court, and the play got more one dimensional as a result, while men's tennis soared with the whole Federer vs. Nadal rivalry, later Djokovic and Murray, and with other players who could sometimes give them a serious game. Serena Williams was winning a lot of majors while being almost semi-retired.