I think it's much less about generation than about material conditions. It's easier to convince someone that AI is going to be good for their bottom line if they are already retired, or at least have a significant chunk of savings (and therefore investments) and a job higher up the food chain/org chart than a new college grad does. For most working class people, age is a necessary but not sufficient condition to have these things, but there are plenty of older workers who are feeling the fear as well.
Yeah, i agree that there might be older folks also fearing AI - i'm one of them! :-)
As to your point about likely being more due to material conditions rather than age, perhaps you're right....but, then again, on average I'd say the older generation tends to have better material conditions/positions, tends to have at least some savings (maybe retirement, or at least will have more solvent social security, etc.?)...than say young folks who started graduating college from around the great recession to about now? So, maybe we're both right???