I’m a big believer that you can have a casual sock bun.
I agree that sock buns do make a look more polished, but you can wear them every day. Really, sock buns are a great go-to hairstyle if you’re having a bad hair day.
To avoid looking like I tried too hard if I wear a sock bun to class, I keep the rest of my make up to a minimum and leave the bun a little messy. Instead of any eye shadow I wear liquid liner on the top and a coat mascara then I’m good to go.