The danger of widespread law change on discrimination, is that it could very easily back fire.
I agree, I personally wouldn’t have the physical strength to be a fire fighter, or a builder. But that doesn’t mean that all women don’t.
Similarly, many men aren’t nurturing enough for EYFS. Some are.
Look at what women stand to lose, versus men. Men would be excluded from early years care/teaching, and potentially nursing. Women - STEM, the military, public services, secondary level teaching possibly, mechanics, trades such as plumbing etc, senior management roles.
Capable and suitable women would end up excluded from whole work sectors, and yes - men would be out of nurseries.
We are far better suited IMO employing on capability and suitability, rather than ruling out whole groups automatically.