NR himself is quoted on the TV as saying "he knew he was going in deep as he was entitled to defend his position" he then went on to say "I was surprised that he chose to turn into me" & "he hit me"
LH said "I was wide and on the outside white line. I knew he was there, I could sense he was there, I turned in and he hit me"
LH was not as he stated on "white line" in fact he had over a cars width and a big run off.
LH banked on NR giving him room. NR banked on LH giving him room. Neither gave way = boom.
We are not in the car behind the wheel and TV gives a closeted perception of the real thing.
What we do not hear or see is what is said before the race behind closed doors. It is very likely that Mercedes along with all other teams will have told their drivers, whoever is leading on the last lap must not be challenged. Bring the cars home in one piece. That has been the mantra in F1 for many many years. Prost (who knows about this stuff) said after they last collided that this will happen again and again with them, unless Mercedes bring in team orders or get rid of one of them.
We have two huge ego's driving the two best cars on the grid. NR is desperate to win the championship. LH is equally determined to do so. If neither will gave way of their own accord then the team has to rule.
Toto stated "I thought and believed that we had agreement, then they go and do it again" He doesn't want team orders for the last lap. But I think he now accepts that without it they will risk the manufacturers title over the drivers title and the team will be a laughing stock.