4 kids will fit after everyone has been dressed, got their shoes on, got their shoes on again, been lifted/chased into the car/bike. That's what I meant by "screwed". The choice of vehicle doesn't really matter.
Once they're older, kids can bike themselves or walk. Families also manage that.
I don't see how you managed to see something like that as condescending or condemning your family choices. It's just a problem that parents with four children presumably have to deal with?