Change is evolution, as long as it's successful. It's the very definition of evolution. And it's irrelevant whether we're talking about bow tie colour, jacket length, or genetics. The mechanism is irrelevant. But for the record, if one person introduces a new style or change, and it gets widely chosen (selected), and copied (reproduced), then that is exactly what reproductive success is. Perhaps it would help if style were thought of as a meme, which I guess it is. Style is just an idea in our heads. And memes act like genes do: changing, evolving, succeeding or dying off.
Maybe you would, but my ancestors certainly weren't wearing morning dress... if clothing and styles didn't change I'd presumably inherit their tradition, not the tradition that your ancestors apparently followed, and I would be wearing homemade overalls or something similarly befitting of my family's working class roots.
Be careful not to over-estimate the past ubiquity of the clothing tradition you have chosen to follow.