Why do people like auto-indentation? It's just extra work undoing it when it decides I need indents when I don't, plus the mental overhead of "will it autoinden

Why do people like auto-indentation? It's just extra work undoing it when it decides I need indents when I don't, plus the mental overhead of "will it autoindent here?" all the time. Pasting is the worst, especially when it decides that as some config starts with a comment, it should turn it all into comments. :set formatoptions-=ro and :set noautoindent are the first lines in my vimrc.