If we couldn’t stop micro transactions at horse armor we’re not stopping this. The lure of Sony exclusives is going to outweigh privacy concerns every day of the week.
You also have to understand that releasing on Steam is only short term action, the plan is going be to bring PSN to PC and to release Sony hardware to go with it. Steam has had it too good for too long and Microsoft’s aggressive moves over the past couple of years has forced Sony’s hand.