Nobody prevents Indian women to apply for H1B jobs in US.

> Its counter-productive to institute gender and diversity requirements at (tech) companies, where the core problem is at the fundamental immigration level.

I don't see anything counterproductive in blind recruitment. It's a normal practice, along with randomizing resume review in a few big companies in places like India, or China exactly because the issue of nepotism, bigotry, casteism, classism, and people slipping their university fraternity members into the company is so severe there.