So your position is that he should continue playing with a torn ACL so that he doesn't allow for any perceived preference for tournaments? I think most people react the way Tiger did. They get the fix done ASAP unless there is something in the immediate future that they feel they can make a slight delay for.
It seems your reasoning does not ring true for many of us here.
No, my position is that he had options and he chose the one that made sure that he played Masters and US Open.
Tiger's knee problem is a chronic thing. It is not like he just picked it up, it has been bothering him for awhile (as he has stated on his Website).
He had three options to treat his knee which needed an operation (and be out for several months).
1. Get the surgery off-season, skip the Masters but play all three other majors.
2. Get the surgery after Masters, skip US Open and possibly British, but play PGA
3. Get the surgery after Masters and US Open, skip British and PGA
If I consider The Open to be "the true champion" (or even PGA), I take the option 1.
If I consider US Open to be the most important, I take the option 1.
If I consider Masters to be the most important and others about the same, I take the option 2.
If I consider Masters to be the most important and US Open a close second, I take the option 3.
He chose the option 3.