If they can make it such that you can have a placeholder Sony account that can’t access all PSN features, for the sole purpose to play this and other Sony games on Steam, that anyone in the world can access, that would be an acceptable compromise to me.
If they did that then what is the point in requiring a login at all.. just remove the damned feature that is not required and very few want. We know it is not required as the game has been working fine for months without it. There is zero need for you to need a login for this game. Except that sony wants more user information they can sell to others.