Are people really saying if they'd known about climate change 10/20 years ago they wouldn't have had their children? People did know about it back then. The difference was it wasn't shoved down everyone's throats on social media/ constant news etc.
Possibly wouldn't have, I don't know. The point is that it's not just climate change, it's the apparent complete unwillingness of most countries' populations and governments to do what needs to be done to deal with it. That wasn't so apparent 10/20 years ago. It was like "oh, climate change looks like getting bad, we'd better do X Y & Z about it . . . yeah, well we're making SOME progress towards X, and yes we really should start on Y & Z soon, before it gets to the point we can't reverse it and it's going to literally burn us alive."
Now, some estimates are that it's ALREADY irreversible, some that it's within a few years of becoming so, and it HAS started burning us alive in the form of increased wildfires and freak weather events. And yet people are still pissing around with X and failing to do Y & Z because they can't muster the political imagination (or just the acknowledgment of reality) to address them.
The fact that you refer to some peoples' attempts to publicise the imminent destruction of civilisation as we know it and convince people it's really rather important as "shoving it down everyone's throats", as if it's an irrelevant inconvenience like having to hear about somebody's religious convictions on the bus, is a perfect illustration of precisely this problem.