>> Blue cheese doesn't go on pizza because the flavor would clash with the
>> tartness of the tomato sauce.

There is an entire world of pizza outside of a tomato sauce based
pizza. Pizza agli asparagi....Asparagus and Ham...mozzerella, olive
oil and parmesan. Pizza Di Cipolle E Caprino.....onion, olive oil,
red wine vinegar, fresh goat cheese and chopped walnuts. Pizza Al
Pesto....Goat cheese, olive and pesto. Just a few of many without
any tomatoes!