Why do so many people cut corners? Doing it right take 10 times longer than expected. Why does everything take 10 times as long as expected if you do things right? Let me tell you about my day.
Zwave dimmer died, it was making the lights flicker. Which breaker is it? Check the nearest outlet, that's not it but it also isn't GFCI even though it is in a bathroom. So I replace it with a GFCI, label the outlet and the breaker, then test the new GFCI works. All good, back to the switch I was supposed to be working on.
Check the next nearest outlet to the switch. This one is GFCI but it is a 20a outlet on a 15a breaker. So I replace it with a 15a GFCI, label the outlet and the breaker, then test the GFCI. All good, back to the switch I was supposed to be working on.
Ok, it looks like I'm out of luck with the breaker finder. So I start guessing breakers nearby in the panel that aren't labeled yet. 4 trips back and forth bathroom to breaker panel to find it. Now I can finally replace the switch I set out to replace. This one has power through the outlet box and the connections through the box are poorly installed wire nuts, did I do that? Time to redo the connections properly with Wagos. Then finally, label the outlet and the breaker.
Now for the good news. I still need to update all my HomeAssistant automations to the new switch and I have 2 more of those dimmers that also died in the same storm.