Of course females in their 20's enter the workforce. They also buy houses. They also decorate those houses, with candles (huge industry), paint (massive), knickknacks (ever heard of pottery barn?) and - wait for it - handmade goods.
Why handmade goods? Because having a family - nesting (it's a very common term, google it) - usually forces one to re-evaluate their world views. A woman with a house full of pottery barn items starts looking for something more authentic, and she usually goes for something handmade. This is why farmer's markets and such are a growth industry.
Of course it's a stereotype, but it's also a very profitable one.