Does the opposite: creates far more social interactions as you meet far more people and run far more dungeons.
Simply untrue. You can manually from every single dungeon group even with RDF in the game. Just another example of anti-lfd posters not knowing how the system works.
The most toxicity I’ve ever experienced in WoW is TBC Classic. The dungeon gatekeeping is ridiculous. RDF has nothing to do with ninja looting. Reputation means nothing already, and now you can change name and soon faction and race. Not to mention especially on megaservers everyone is a stranger. By contrast, RDF back in Wrath was a fantastic experience. Met a lot of people and had a lot of fun.
How? You can still manually from every group. It will encourage players to invite people they meet because it’s so easy to queue up and run some dungeons. Which right now doesn’t often happen because it’s a waste of time. RDF actually builds communities.
Those people are…well, idiots. RDF isn’t even used at max level. And take it out of leveling and what happens: no one runs low level dungeons. Is that game suddenly better because of that?