Good for him. At least he sticks to his guns regardless of the cost to his putative glory. A person at his level of achievement is competing for reasons of vanity alone. There is more to life than chasing title #s 21-23.
I doubt he is avoiding much personal risk in refusing Covid vaccines, but I also doubt very much that Covid vaccines have any utility at this point, personally or collectively.
Exactly. He has nothing to prove. The tournaments he misses miss him more than the other way round.