I tend to wear the liner shorts for short errand rides. I cannot sit on a bike without a chamois. Even the liner shorts don't work that well for rides over 5 miles. And, my regular shorts are not super padded (Terry Bellas and Sugoi).
I bought a pair of padded underpants from TE quite a few years ago. They were huge granny panties; there was no x small so I got smalls (my azz is not that petite). They went in the trash after a few attempts at riding in them.
When I commuted (13.8 miles), I wore regular cycling clothes.