Three hours for a curtain swap seems fast, but you might be missing that the real value is in knowing the mirror bumper and light seals are already 60 years old and about to crumble anyway, so charging for the full CLA now saves you a warranty headache in three months.

find more creative ways to waste time" - you just outsmarted the software that was supposed to outsmart you.

You said "twist splices by hand and tape everything up" but real old school guys know you were supposed to solder those joints after twisting them. Tape was just for insulation back then, not for holding things together. I still use wire nuts on anything over 15 amps because I've seen way too many Wagos melt on dedicated appliance circuits.