The only scar I have in my face is when my brother closed a glass door on me, and I have been shaving with a safety razor for years now. Sure, it takes a bit to get used to, but that’s with anything new.
Have I nicked myself? Yes, once or twice, a few months in, when I got a bit too cavalier about shaving with it (it’s still a sharp blade). But it didn’t leave a scar.
As a QA person I despise those programmers.
“Sure buddy it works on your machine, but your machine isn’t going to be put into the production environment. It’s not working on mine, fix it!”