On the contrary, in my case the places it's most necessary for me to use a trip line are also the least crowded. I often sail on a lake that has a lot of sunken trees and branches. I use a trip line there almost always because the anchor very often becomes trapped under a branch. At the same time, there are few people who anchor overnight on that lake and, in four years of sailing there, I've only ever once shared an anchorage with someone. So, it very much depends on circumstances.Trip line is ok if the anchorage isn't crowded. But then, it isn't needed.
Also, no tides on that lake, so no risk of tidal reverse taking me back over my anchor point.