I am not specifying any style of dress, I don't have preferences, it did not bother me that the builder's clothes were a bit grubby, they had just come off site. Another builder sent their contracts manager, I can not remember what he was wearing, probably not a suit, probably a quilted jacket, but he looked and sounded as if he knew his job.
It is whether someone is dressed tidily or not and whether clothes fit. Boris Johnson always looks and sounds a shambles and from his performance as Foreign Secretary and comments about how he worked as London Mayor, he clearly is. not a man you would want to trust the country with. As for comfort, I have never worn uncomfortable clothes and both style and fashion, well chosen, can be very comfortable.