The gap will also probably close somewhat, over the next 20 years, across all esports. Esports is extremely young and unrecognized by normies. Male focus marketing has kept women out of video games from the beginning. Counter-Strike is the only other real tactical FPS, and ain't nobody gonna argue that it wasn't so toxic that women could barely consider playing casually, much less professionally.
And don't discount the insane change in general male/female relations over the last 10 years. Cancel culture was awful, but things overall have gotten way better since GamerGate in 2014 and Weinstein in 2017. It'll take a looong time for those changes to really take effect. The future T1 women are probably like 5 years old right now. Valorant and Riot are generally ahead of the industry. Chess is still extremely male-dominated for no apparent reason.
50/50 split is unlikely (the genders are indeed different), but 25% women in T1 seems possible. Riot is doing good, it'll just take time.
Why do I write on this site, noones gonna read this lol