Plumbing is way, way easier than drywall (in fact I would go so far as to call the supply side of it “easy,” including soldering copper pipes); it’s just that the penalty for failure is so much higher.
I partly agree and partly don’t.
Plumbing as a field is way broader than installing drywall, and there’s a ton to learn. No single plumbing task is really harder than hanging drywall (except maybe welding), but doing all the drywall in an entire building is a hell of a lot easier than doing all the plumbing for it.
I’m only talking about DIY plumbing a single-family house, and I only said the supply side was easier. The drain side is more complicated to understand, with the slopes and venting and whatnot.
There’s also the fact that the tool is 90 degrees but corners rarely are.
that’s what changing the angle compensates for
but then you have a sharp internal corner
if that works for you, then yeah no point using this
Not all imperfections are created equal. I don’t worry about ridges because those sand away with few passes. It’s the parts with too little mud that I need to re-fill that I try to avoid.