There are two kind of person who ask for a tldr:
Someone who doesn't understand or care about the depths of works and only want the information because of this.
And people who appreciate it but lacks time.
If I see the markers of something I judge bad, or if I dont have enough time right now, I wont consume this content in depth.
Maybe it is a subset of people who lack time. But, I think there’s also sometimes an attack built into the tldr: “you don’t know this material very well, here’s how you could express it better.” Like any attack it is sometimes wrong, sometimes right.