Sometime, I still do and I like the fun and thrill of locking in a hotel room after a meeting and coming out in lot less days these days (pppppsssstt, because of AI) and get into the next meeting showing off what can be done that was discussed 48 hours ago.
You do them because they benefit you.
Not going to benefit you? There's lots of ways to say no to a back-channel request. Not a back-channel request? Then I guess it's not someone else's job!