In architecture, myriad materials are brought together, each with their own unique characteristics of density, structural strength, tensile strength, potential usage, and appearance. The combination of those materials is used to create a structure that performs a function, and that does so with ease of use, clarity of purpose, and hopefully, beauty.
Exactly the same set of things are involved in the creation of a garment. A garment uses various materials, each with specific characteristics, to do exactly the same thing; make something with a purpose, that does that with ease and attractiveness. The only salient difference, is that the materials are mostly flexible, where in architecture they tend to be rigid.