Or capable. I imagine the IQ bar is set quite a bit higher for STEM-like courses and careers... Also, there's much less room for bullshit (at least in programming - your code either works, or it doesn't work, and that's really easy to verify at university and when applying to jobs - as opposed to e.g. marketing, where it's much harder to quantify someone's skill).
Actually, I remember hearing quite a bit of complaining back when I was in middle and high school. However, it occurred alongside a concerted effort by the Province of Ontario to increase the supply of tradespeople at a time when there was a shortage of 'qualified' (read: certified by provincial licensing bodies) ones in Ontario, which led to exorbitant prices on associated goods and services. So, to be cynical, this could be much more about price correction than anything else.
Gender equality in STEM is more about just getting them in.
It's about social mobility for women. Which is why nobody cares about getting women as miners, plumbers and getting men as social workers.