Why is cutting so bad?

I haven't cut in a couple of weeks, but I am definitely addicted to it, and I am having overwhelming urges to do it. The only reason I won't is because people are bound to notice (even on my hip), and they all yell at me and call me "emo" and "attention whore". I don't see why everyone says it's so bad. I get that it can lead to infection, but that won't happen to me, I'm careful. I won't end up cutting too deep. It doesn't hurt, per se. I am proud of each and every scar I have because they are part of me, and I'm proud of who I am. Can anyone give me a legitimate reason not to cut--for me? Please?