I think many women and indeed men are happy enough (so not ecstatic with, but happy enough with) a few years at home knowing that those years essentially fly by and aren't forever.
I outsource the bits I hate - I'm nobody's slave and a lucrative career, which I was ready to give up regardless of any children that came along has afforded me the ability to do that. I dont depend on my husband for income or financial security, though he happens to also provide that. If he trades me in for two 20 year olds when I turn 40, I will easily stand on my own two feet financially. Perhaps if I didn't know that I would feel all nervous and desperate, but I doubt it, as I dont think he will bugger off regardless of our situation.
Despite outsourcing some of the less fun stuff I still have to pick food out the highchair and deal with various amounts of snot and shit.
But I'd be thorougly burying my head in the sand if I thought I wouldn't be dealing with 10 tonnes of metaphorical shit at work if I returned.
I'm happy with the real stuff for now. If I get bored of it, I might start up another business.
Anyway I'm not trying to sound like I'm justifying my choices to you - I dont feel the need. I just think there are a lot of generalisations being made.
I'm not at home because I have no choice. I'm not at home because I can't afford to work. I wouldn't have more fun working, or I'd be there. I dont rely on my husband for money. I dont spend all day cleaning. It is not expected of me that I deal with all kid stuff when my husband IS there. The daycare I do use occasionally is not run by stupid women. They are bright and interesting, qualified teachers who genuinely love children. Hell, some of them are men!