As a matter of fact… Yes, and No.
Yes… one cannot check the oil level with the engine running,
No… (like a trained and licensed HVAC tech), For starters… I am a trained (auto and truck mechanic), Certified (ASE)(Chrysler NCP), Licensed (CA-BAR, expired), card carrying member of the UAW (United Auto Workers)(Retired), with much more training and experience than I can even remember (and no, that is not an age problem).
I do believe I have earned my ticket to open a vehicle hood without turning the engine off!
Do you remove a stuck piece of toast with the cord still plugged in?
Somehow, I think you do!