It's possible that the assumptions in their analysis may be wrong.
There's nothing with which to pin the blame on foam.
Except that it hit the left wing and it appears that's where the failure occurred.
If it wasn't foam, something else must have caused the problem.
That's still possible, but how probable?
The dimbulbs weighing in here are so convinced that it MUST have been foam are talking out of their collective rear end. They haven't got a single clue -- they simply assume that everything is a conspiracy.
I do know which side is doing the most name calling, at least for today.