There are plenty of moderately padded seats that you can ride without cycling shorts.

For instance, I stlll ride my old Stumpjumper with an Avocet saddle. The original is a little shot(after 20 some years), but I never have and never will wear cycling shorts while riding it.

On my road bike, I used to use bib shorts, and the whole nine yards with Time pedals and on and on. Then I was unable to ride for a few years. When I started back. . . my first thought was to ditch the clipless, go with large platform pedals and tennis shoes, and ride in my favorite shorts(not cycling ones). I switched to a wider and moderately padded saddle(Lookin MOD), and I enjoy riding more than ever. Sure, sometimes sweat runs down my legs. . . but so what. . . it beats wearing what is essentially an adult diaper.

I say ride in whatever you like. . . padded seats ... unpadded seats . . . regular shorts or diaper shorts . . it's all good.