It is an example of ageism to assume that "the older you get in general, the more non-work priorities you have." Basically that is what's implied by the "ism" p

It is an example of ageism to assume that "the older you get in general, the more non-work priorities you have." Basically that is what's implied by the "ism" part - assigning the characteristics that may be present in some members of a group to all members of that group.