gc players (women and marginalized genders) aren't lacking in talent. it's not for lack of skill or trying that there aren't women in t1, but for lack of players.
every dumb fucking sweaty loser boy probably picks up either a controller or pc/simple gaming laptop at an early age, regardless of whether they end up going pro or not, most men in their lifetimes end up playing video games young→ the playerbase and talent pool is larger. most men get a chance to at least try and see whether they have a natural instinct/skill for a game
to give a comparison outside of esports, the large majority of opera singers are female, not because men are inherently "worse" singers but because more women on average try out (opera) singing. we know men can sing.
we know women can play at very high levels which is why it's important to not restrict opportunities based soley on gender
tldr talent pool small bc not all women play video games →→→ unequal opportunity →→→ unequal representation, the next demon1 could be a girl who will never make it pro simply bc she's never ever thought of playing video games in her life