We should stop gender splitting in competitions where brain power is the only deciding factor

In tournaments or challenges in things that need nothing but knowledge, they still have male and female versions.

I believe the division of gender in things like chess, math, spelling bees, science-based competitions etc. should be stopped as mental agility is on equal grounds and female,male, and all members in the LGBTQ2S+ have equal chance in being victorious.

Please give your rationale behind your reason to disagree