Which one - the principal of going out and about against the rules and being photographed when he had covid or the principal of lying on his arrival form. Take your pick.
No, if he had principals, he'd have said something like "I don't believe in the vaccination, I've not had it and I don't want to comply with the Australian rules regarding entering their country so I'll give this tournament a miss" instead of acting like the greedy, lying, entitled, vaccination coward he is.