I don't usually use breakpoints in part because I use neovim and in part because... I seldom truly need them. Who are these people and what are these problems

I don't usually use breakpoints in part because I use neovim and in part because... I seldom truly need them. Who are these people and what are these problems where stepping through method calls etc is actually necessary? I find it hard to believe. I've been successfully programming and problem solving this way for over 15 years.