We are getting trust support for Stormblood in the future. I don't know if ARR/HW will get it because the Squadron system covers that.

SE is thinking about the long term of this game. Over time there will be massive content bloat and the player base will one day begin to shrink at the same time. It only makes sense in order to keep older content alive to have NPCs help you solo the content.

With the end of the current story arc happening in Endwalker, I can see a future where new players have a sped up version of the MSQ where basically all of the filler quests are replaced with a cutscene that summarizes what happens, and they only participate in key plot moments + dungeons with NPCs. That way you won't have to play 500 hours of an older storyline to catch up to your friends doing 10.0 content and they won't have long queue times because the player base is stretched too thin over the variety of content to help new players catch up.