It was a big dive, but he was all the way alongside. He didn't just dangle his nose in and expect Arnoux to leap out of the way.
Witness Lewis's radio comms about Massa "He just turned in on me on purpose".
It's not really about pulling two moves apart to the Nth degree, or dragging up examples from 30 years ago to prove the minutiae of an argument. It's a general issue about Hamilton which has been with him since GP2 and once again Brundle's summation is about right: "It can't always be the other guys' fault"
Listen to his interview "Massa blocked me in qualifying and I get the penalty." He got the penalty because he cut the course.
If you don't think you ever make mistakes, or you don't have anyone in your circle to tell you when you make mistakes then you don't learn and you don't evolve - and he needs to learn because he's not the finished article.