The top teams in California can hang with anyone. In any given year it's only a few teams in a huge state. Would they win the MIAA or IAC, probably not, but they would certainly compete.
Torrey Pines and SI test themselves against out of state competition on a fairly regular basis, just not this year.
I recall Landon played SI a few years ago, they might have played 3 times. While Landon won 2 out of 3, I was super impressed with the size and athleticism of Saint Ignatius. I think even Gonzaga might have played them as well.
Torrey Pines a few years ago beat Deerfield who is a big time powerhouse in the New England West Division.