Rule number one of dealing with other people in pretty much any kind of communication is that we never know what somebody else is going through. Everyone has their reasons for doing things, and they aren't always fully apparent. More than that, sometimes they are none of our business as well. This is especially true when a person is doing something that isn't harming anyone else, but not everybody feels that way.
It's nice to get the opportunity to clap back at those rude people who think they're entitled to understand all of your personal choices, as one recent r/MaliciousCompliance story has made clear. When a nurse started wearing stylish, colorful wigs to hide her alopecia, one of her patients decided to challenge her on it, citing unprofessionalism. This confrontation led her to drastic action in response.
Redditors were fully in support of the move, pondering why some individuals feel so entitled to make such comments. There are a lot of miserable people out there.