I think it's clever because we all (at least those of us over 35) recognize this tendency in our own thinking, at least to some extent. It certainly doesn't mean we reject or are incapable of learning new technologies. It's more about introspection—realizing for instance that the fact I have little use for TikTok is more about me than it is about TikTok. Personally I don't feel it needs to have any ageist connotation.