Fashion is a form of self-expression and autonomy at a particular period and place and in a specific context, of clothing, footwear, lifestyle, accessories, makeup, hairstyle.
Off the rack clothes are not designed to fit you.
And I mean you, as in you specifically.
They are made to roughly fit 1000s of people who kinda-sorta share several similar body traits because it’s inexpensive, off the rack fashion, not bespoke custom and that’s how it works.