Not exactly.
1. Somewhere like Pizza Hut isn't going to offer anything very exotic as a topping choice,
2. so
3. it's hardly surprising that most pizzas are perfectly acceptable.
Doesn't follow. While both parts 1 and 3 of you sentences are correct, the "so" doesn't fit at all. Are you saying the vast majority of non-exotic pizzas in the world are acceptable? Or non-exotic-ness causes acceptability? Both are pretty difficult positions to argue for.
Unless you're a vegetarian, or allergic to tomatoes and cheese or something, any pizza they serve is going to taste pretty similar.
Ok, so assume no special needs like allergy or restricted diet. Still, all non-exotic pizzas don't taste similar - cheese and tomato both are non-exotic yet taste wildly different from each other.
Only low quantity of toppings and leeching flavour and taste from toppings can cause pizzas with different toppings to taste similar. Non-exotic-ness is a factor with pizza hut but it doesn't fit with your post at all.