What would be your alternative ? You think that people look better in working casuals ? Suits ? From your comment I would suppose that you are living in the US.

I personally wear jeans pretty much exclusively and have no problem with it. I prefer and search for heavy jeans.

In my opinion people always look better in fitting clothes. If they are wearing unfitting jeans, they are going to look bad in it. If they are wearing unfitting suits, they gonna look bad in it. If they wear fitting clothes nearly everything works.

Many years back I've worked with an American company (I am from Europe) and they really didn't like us wearing jeans all the time (a totally normal thing to do in Europe where I am living). They said it didn't look professionel enough if you aren't wearing working casuals.