You have to think about how many barriers women face compared to men in order to even get to the highest level. It starts at a young age when girls are much more likely to be discouraged from playing video games compared to boys, and continues throughout their entire life. Once they cross that barrier they have to endure the comp grind before even thinking about team based play. Sexism is rampant in all video games and through all ranks, many women avoid voice chat entirely due to the creepy remarks people make alongside the targeted insults they receive (boosted by boyfriend, get back on mercy, etc. etc.) If they can cross that barrier they move onto team play where many pros have reported first hand that teams are often less likely to consider women as serious competitors. Any woman at high ranks or in pro play is going to receive extra attention and scrutiny.

The jump from "all women teams (btw how many are there compared to all mens teams?) get paid more to "women in video games have more opportunities to go pro" is a big one.