Generally, people just do exactly what they want - in the laziest, most convenient way. Then, they invent 'reasons' for doing it.
I really despair at the attitudes of adults/older adults/very elderly and yes, I do think the younger generation need to educate them (yet again) about the consequences of their actions - and drive home those vital messages. No, it's not a lack of information - it's a denial, a lack of change.
I can't see how a lifetime's experience brings wisdom, either. Any examples? It's just history, it's way out of date. All there is, really, is a stubborn reluctance to change habits, a refusal to make a real effort - just token gestures. It's 'Let's recycle our plastics, eat less meat, buy fewer clothes - and surely that'll do?'.
There's that same cognitive dissonance, again, that awful conflict between beliefs/ideals and behaviour/wants, the feeling of discomfort - and the consequent wish to justify that behaviour while attacking other's views. All very predictable human nature, all so depressing:
'There are five primary types of cognitive dissonance: post-decisional dissonance, dissonance from wanting something we can’t have, dissonance due to inconsistency between attitude and behavior, dissonance due to inadequate justification, and dissonance due to inconsistency between commitment and information. People invested in a given perspective shall—when confronted with contrary evidence—expend great effort to justify retaining the challenged perspective'
courses.lumenlearning.com/suny-hvcc-psychology-1/chapter/cognitive-dissonance/