Bibs...there is a reason they are the most popular form of technical clothing for cycling. They work.

There is also a reason why ultra high end shorts are not the norm....because there is little to no demand....because they suck.

This is akin to a non-initiate to our sport asking "why the goofy lycra shorts...." - they ask because they don't know and they don't know because they don't have a clue and/or have never experienced it and yet apart from the occasional sadist who refuses to wear shorts with a chamois...everyone who rides uses them....for a reason.