I made it very clear that it is a very crudely and oversimplified example, it was more to demonstrate that applying time based events to a standing pool and expecting immediate changes does not work even mathematically.
STEM in India is expanding, but it's also not a small starting industry either. Change in the representation of females in STEM industries is a generational thing and is slow and the other societal impacts have to be taken into account too. It's positive that it is changing and improving though, even in the UK, but expecting 40% of graduates to equate to 40% of workers in anything less than 20-30 years is silly and that's before societal impacts come into play. it doesn't mean that we shouldn't push for more equality though.