I agree that Mille Lacs is a completely different beast. And most launches don’t go out all that far. Most people fishing LOTW are going miles out.
I have a tritoon and I respect big waves because I’ve had times when the boat goes down into a wave and floods the deck, people get tossed off the seats, and stuff starts sliding around in the water. It’s true that in moderate waves, it does help to go fast to get on top of the waves, but I’m guessing the LOTW conditions were much worse than that.
As far as salvage goes, unless people thought to mark it on their graph, it’s going to be some sonar time just trying to find the thing in that lake. It’s not like the water is clear enough that you could have an aircraft spotter find it.