You're not being annoying no worries.

I would encourage you to look this up and decide for yourself, I've just noticed these studies dripping out over the years.

I think there was a researcher named Paul Dolan who's written the most about it.

The idea that having children makes people happier is subject of great debate as well I wouldn't assume that's the case. In fact the parental happiness gap has been pretty well researched too.

Why might these be true? That's a whole discussion in itself. Very controversial topic, I don't find it very fun to discuss because people get upset and defensive about their own choices. Just sharing some observations of research I've seen.