There is difference between dressing casually and being slovenly. A guy wearing a dirty seed corn cap and a wife beater in a restaurant is just a slob.
A local, nationally known local steak house used to keep ties on hand if a “gentleman” showed up without a tie. Now the draw the line at shorts and/or tee shirts
I like dressing up and going out with MrsWD, but I have a trophy wife who makes it worth it
It’s not just dress, there has been a decline in general decorum. Look at what comes out of the mouths of our politicians.