No, it's not "exactly what you proposed." Your proposal would see a system where women would never reach the top tier of any physical sport, perhaps with few exceptions. There would always be a tier out of reach, and believe it or not it means a lot to know that winning is achieveable. This idea is so detrimental to a woman who wants to seriously compete in anything.

In fact, comparing a talented, hard-working woman to a man without the same level of talent or effort is such an insult. "They both have a disadvantage, one was born short and lazy, and the other was born a woman." It's not the same.

Also people who aren't talented and who don't put in extraordinary effort have lots of spaces to compete with each other. Co-ed leagues exist and they're lots of fun. Amateur leagues exist too, at different levels of competitiveness, for those who are competitive but like you said can't hack it at a professional level. But just because those spaces exist doesn't mean that should be enough for women who are inspired to be the best.

I give up, go play a sport.