Form follows function. Bike jerseys are designed for biking (ok not for recumbents). The long tail, back pockets, ventalation options with zipper, more aerodynamic (or just less flapping fabric).

Same with bike shorts......designed for efficent cycling.

That said what you wear for commuting has a huge number of variables. Personal preference, weather, lenght of commute, type of bike etc etc.

On my current commute...I just wear my work clothes...Khakis and a poloe and put a band around by pants leg. But this commute is only 5 miles one way, I am riding my utility/commuter bike (english 3 speed feel)I don't go hard, flat land and even when it is hot here, don't have a lot of humidity....so it works for me.

On past commutes I wore bike shorts and jersey......commute was 10 miles one way, I went a lot faster (both to cut commute time and to match traffic) and used my rode bike.

YMMV but all the negative vibes on bike short, jerseys, full kit etc ignore that they are very functional, especially for longer harder hotter rides.