You're trying quite hard to push a certain viewpoint, but it's pretty dated and limited in its ambit.
Most studies show that single women without children are happier than those with children, either single or not. Even without wealth or privilege, there's sufficient ways of travelling cheaply or doing certain sporting hobbies that make life great, which having kids would almost totally prevent if you're not wealthy.
There's so much to do. I guess thats why people send their kids away to school or for the summer right?
Theres a sort of moderate, middle of the road type of person who will be stuck in the sort of limited mindset that you describe possibly because they lack the imagination or confidence to do much else with their lives. I can't imagine being married and having kids with someone like that would be much more than an everyday set of never ending mundane chores.
I guess we're lucky that most people don't think about it too much, otherwise the human race would slowly go extinct. Maybe its the sort of women you meet that makes you think like this? I know plenty of single, childless women who have a great time but I also know men who seem to aim at the lower levels, probably rightly given their rigid views on what women can/should do with their lives.