Almost every time. In most games, you have a wide variety of game mechanics which are options you can turn on and off to suit your preferences. Elden Ring is just a game to me, not a religious experience, and I personally think it is silly to treat it as if it is some hallowed experience. It’s a combat RPG with a reputation for really difficult combat, but it’s just a game. The PVP invasion when you are doing coop (which is a very limited experience compared to a lot of other games) is just an unwelcome pain in the rump for a lot of us. Providing a toggle to turn it on or off would simply be a good user focused game design.
Personally I think there’s a “Being There” type of thing going on with the designers and long time DS players. “Oh, they intentionally leave out any guidance to the game mechanics so you are forced to go to an online community and become part of a larger society of DS players!” I don’t buy not, e.g. giving in game guidance to what the status icons indicate as some kind of brilliance - I put that in the lazy game designer category (how hard to put a tool tips type help there?)
I’m really enjoying the game at this point, I do appreciate the game design in terms of the world and the challenge. But I don’t buy into the argument that having a toggle to turn off invasions when in coop mode hurts anyone or the game.