Do people really manage to do anything useful with these icon sets, or do you end up having to craft your own to mimic these? I find that I can do the generic a

Do people really manage to do anything useful with these icon sets, or do you end up having to craft your own to mimic these? I find that I can do the generic add/zoom in/copy/settings/blah and then when I need buttons for "Show wiring" and "Set milking schedule" or "View restaurants" then it's tricky to use an icon, but too time consuming to try to create a new one. The usual antipattern is "OK I'll use this lightning one as a placeholder to mean do-thing, and I'll create a better one later". That never happens, so you have these monochrome overly generic icons around.