Sure, "Don't trust anyone over 30!" (or 25, or...) is just a claim that the preceding generations are too invested (in both senses) in the status quo to conside

Sure, "Don't trust anyone over 30!" (or 25, or...) is just a claim that the preceding generations are too invested (in both senses) in the status quo to consider sweeping changes. Of course, sometimes sweeping changes are for the worse, so that doesn't seem to me like best battle cry, really.