not a lot of spare time or money.
The barrier to entry is money!
And that's kind of the point, isn't it?
Because men on the whole get paid more than women. Not many genuine equal pay jobs around, even if the basic salary is the same the people bearing and raising the children can't do the overtime, and often have career breaks, which don't help promotion prospects. So there is less to spend on toys. Unless the higher earning partner shares the toys.
At least that's easier to do with an aeroplane than with a set of golf clubs.
A month later she had the baby followed by another and (unsurprisingly) did not want to fly in a light aircraft again for some years and has never renewed her licence
I've seen a lot of women stop flying for fun when they have a baby, and on the whole they don't start again.