I would add that the sentiment is also wrong in the other direction. I’ve personally encountered multiple parents and grandparents who hit me with the “well it won’t affect me, I’ll be long gone” reasoning regarding climate change.

So yeah. What a stupid and offensively self centered thing to say. If you personally didn’t give a shit about other people before, that’s actually a character flaw, not a rite of passage you complete by roping children into this mess