Its an interesting discussion no doubt. Sometimes easier to have a "dress code/standard" in an office as it sets an (externalised) baseline.

I think the key thing is balance, not everyone is comfortable to wear a 3-piece suit but also few people are comfortable working with people who ave poor hygiene (e.g. dont shower after the lunchtime gym)

I think as long as someone is clean and presentable (context dependent) then there shouldnt be an issue.