Alternatively, keeping kids locked up at home for the first 3-4 years limits their exposure to a variety of situations that help their brains and bodies develop. Then the next generation has a terrible immune system, no social skills, and are underdeveloped mentally.
In fairness, I _do_ agree that there are some things that need to be given up as a parent of young kids... Don't take your kids to a fine restaurant. But at the same time, I don't think children should be excluded from 95% of things because it inconveniences someone else. If it were about preventing people from inconveniencing others, then I think there's a strong argument that it's more than just kids that shouldn't be allowed to do the "fun stuff".