very interesting reading.
I think you have to factor in the financial stability of your career. When you have a familiy, and/or regular financial commitments, it is difficult to balance everything if your monthly income varies by hundreds of pounds. Really stressful too, IME. Even if you freelance part time, if you are worrying about work and money full time, what's the point?
I found this when I ran market stalls selling retro clothes. At the time I was the family's main breadwinner (also worked mon -fri in other job but market stall money was a necessary top-up).
Some weeks I could make lots if a Japanese buyer bought 20 dresses for silly money and the sun shone all day bringing out lots of punters. Other times I could be faced with an unforcast thunderstorm and see all the customers deserting the market in droves, get my precious stock wet in the rain, and be lucky to make any money at all.
Now if I had relatively low outgoings, for instance as a single woman living in a flatshare, I could more easily survive the bad weeks. Once mortgaged and with children, with bill paying dependant on what I bought home, a bad week could have really bad repercussions.
Now, had my market stall income merely supplemented my partner's income, merely providing us with luxuries, it would have been a nice way of making money. But IME freelance work is not so workable if you need to depend on it.
Like wordsmith, I have also freelanced as a copywriter and found this is a very up and down way of earning money, too.
So in answer to the OP, if young girls choose a career that offers part time/freelance options, this may be at the cost of their financial security and independence. Sure they can freelance but will be more dependent on their partner earning regular money.