Johnny, you obviously don't know much about F1. There are plenty of slow drivers plodding about at the back of the field on daddy's sponsorship cash. They're not there for their speed.
And your Ronnie Sullivan analogy is daft. 99% of male snooker professionals can't live with Ronnie. Does that mean they shouldn't be allowed to compete?
I actually agree with you in part about the designation of non-mixed sports but not for the reasons you quote. My worry is that mixed participation will dilute people's interest, not that women couldn't compete. If The Masters, say, was 50/50 men and women it wouldn't attract the same interest, rightly or wrongly. That's just the way people are.