The only problem I see with that is the fact that people may try to exploit that, such as going afk into these higher end pve playlists or grief, and thankfully but unfortunately you can't really kick players in your game unless they are in your fireteam. Huge griefer potential. Though as another solo player I understand your frustration, most of the times I dont really have a problem with bungies fireteam search with master wellspring or legend psiops the more easier late game content, but that place is full of cheesers/kwtd tags that dissuade most casual/new players the higher end content it is.