If you’re banned on steam for shitting up the game, they don’t want you making a new account to shit it up on PSN. And vice versa. Currently you can get banned in game on steam and just pack up and move to PSN.

It means to be an incessant troll you would have to limit your account spam to the PSN side, which requires 2 factor, or make more steam accounts as well.

So halving the troll problem for Arrowhead by not having them chase two separate account systems.

It is likely also so that matchmaking and player counts on the PSN side can be accurate. If there are 300k people playing, but the PSN only reports half of that, it makes the game population seem much smaller for new users.

Honestly i treat it like Origin or EPIC. I don’t love having to have it, but the benefits out weight the demerits, and I have the account anyways.