So why not make the Hobbs based on two things - oil pressure or collective position so that it couldn't be claimed that it was a maintenance problem that we didn't notice?
Also put a light in to show that one or the other connection is not working?
Sort of like FADEC computer counting cycles and overtemps - good pilots don't mind it, but those who cut corners are afraid of the stuff. Better TBO and resale values for those with the computers that count.