I don't know enough to say to what degree it's changeable; you can certainly train yourself in other directions, but reflexes learned in early life aren't easily overcome.

I don't think it's necessarily unlogical, eg it's adaptive if you are engaged in hunting or combat for survival. Perhaps you need to explore contexts in which the payoff for successful cooperation significantly exceeds that for defection.

I'm able to change it but it took first seeing another pattern.

Than it takes enough situations.

Have sympathy for your old folks. Of course you have more clear context on this than me so I could be out on thin ice, but hear me out. My inclination though is that it is actually something like fear based. We smile to each other to send the signal “hey, I’m nice, don’t hurt me”, monkeys do that too. And a laugh at those kind of situations you describe could just mean a shocking reflex “I don’t know how to handle this situation” which results in a laugh (and described as “happy”).

I could come up with a few hypothetical questions from this though: 1) do narcissists find “fail videos“ more amusing? 1.a) if yes, then it can be trained away by reminding them to reflect on the situations. This is normal training for narcissism, put them in other people’s shoes. 2) watching the same “fail videos” over and over again makes them boring? 2.a) it’s on the same line as previously, but instead the hope that it internalizes the seriousness of a situation.