Why is it so taboo to admit that you like physically attractive people?

I can see that a decent person would take much more than looks into consideration when choosing friends and acquaintances, but why do people consider it shallow for a person to want their potential mate to be physically attractive?

I’ve seen it a lot here. Even when the thread is particularly asking about what one likes physically in a partner, many come into the thread and say how they don’t care about something as shallow as looks, completely ignoring the actual question, opting to chastise instead.

Thoughts?