I work in a STEM career. I can't open a trade magazine without hearing about the technical skills shortage at all levels from apprentices to graduates. My own discipline is on the UK immigration shortage occupations list as there are simply not enough in the UK.
IME it starts at primary school with all the crappy pinkification and genderised toys and utter lack of proper careers advice. Science, technology and engineering need women's input, let's face it we are the end users of most of these medicinces, cars, phones, airports, power stations etc. Are teenage girls are put off because they don't want to hang out in an A level class without any friends to gossip to? We seem to have gone backwards from the 1980s.
I'm especially fuming about this today with the news that our fantastic local science and engineering museum is being closed and sold. Thousands of schoolchildren go there every year to get hands on with science Big Bang Fair style - what a waste
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So after that rant, yes we should be concerned both about A level physics but also the bigger context. In industry it's considered a crisis with potential to impact the economy.
It's not only about high pay, but it is about opportunities to be employed at all, have a career there is a demand for and use your potential. The more women come into industry, the more family friendly it will become.