Pizza in Singapore

Why must the food in Singapore always be fitted to local taste?? Why can't pizzas be authentic?? This is going out to all pizza sellers. I do not believe in chicken or seafood in pizzas. Pepperoni is almost a must in pizzas too. Choice of toppings is very important. My favourite toppings are: Pepperoni/Ham, Mushrooms(Button/Shitake), Capsicum/Green or Red Peppers, and Olives (optional), with Tomato Sauce as the base, thin crust, and good quality Mozzarella Cheese. This combination is very rare in most pizza selling places in Singapore. Sigh...