You have no idea what I think or what safety measures I practice.
You questioned why one would ever need to work on eneregized equipment, I replied 'making voltage measurements'.
For some reason you are trying to rationalize you belief that voltage measurements are never needed in a service panel at a 'house'.
Not questioning your ability to be safe. Removing the cover is the
dangerous part after that it is a cake walk as to safety for a pro.
My point is that most resy work does not require any 'hot' work. Sometimes but not as a general rule.
Use to work with guys that the only way they could figure anything out was with the power on. That's just sad.
Go wire a home, shovel the wires in the boxes, identify nothing, give me a wiggy and my toolbelt and with no power available I'll connect everything in the home. I'll even point all 3-way and 4-ways down if you like, before energizing the panel.
Do I check voltage at the panel? Yes. Why? Because it is easier.