I'm in this camp from an athletics standpoint. Just compete as your sex, full stop.
People try to say having a "mixed" division for all genders to compete could be a solution but for majority of sports there aren't the resources or feasibility to even have that
Maybe just call the male division "open" and have a female division
That's a damn good idea.
The "open" division would include anyone that was born male (brehs AND trehs) along with females that have transitioned to male.
Women's division would solely be for people born female that are cisgender.
If a dude transitioned at age 8...wouldn't be so ridiculous. When dudes transition after puberty, they got all their grown man muscle and that shyt just doesn't disappear with estrogen and surgery. If 25-year old Bron did that, he'd still be 6'8" 250 lbs with a 40" vertical and probably 2x as strong as any broad in the WNBA...even with hormone therapy.