Is it cruel to make your pet wear clothes?

I think like some people do for a fashion statement or to be cute is very cruel. Why does a dog need shoes, hats, sunglasses, etc? My son loves Beverly Hills Chihauhau, and I always felt sorry for those dogs all dressed up from head to toe, and getting manicures and pedicures. Why does a dog need all that, it's silly. But maybe that is just me. The only time I put clothes on my dog is in the colder months, and even then, it's just a sweater for him to keep warm inside my house, as there is no insulation and outside where it is colder.