It is just a tool in the belt for an engineer. Can you use jQuery in 2022 or later to solve really amazing problems that impact user experience? You sure can! Would you be better off to use a modern javascript variant and stuff like react instead? You also absolutely would.
So just because a tool is old doesn't mean it can't be used to solve real user problems. There are still banks and airlines that run COBOL, and as a user, do you really care that much? I'd take "knows $insert_older_less_hip_tech_here" as experience of having done something for awhile.
Now if I was asked to write a front end today, I'd have to sit down and properly learn react + typescript (because javascript is awful without sensible type checking), and that would add to the time to ship, but is the correct thing to do.