I read a lot of the discussion on the referenced website and there is a common view that although the Healy probably had little choice but to move to the left, that he moved far wider, and unnecessarily, into the path of Levegh and that, had he been more restrained in the move to allow for the possibility that a faster car was coming up behind him (as due to the nature of the Le Mans race is always a real possibility with the different classes all competing on the same circuit at the same time), the accident could have been avoided. I have no opinion, just relaying what I read.