That’s simply not true, a marketing a line from jamf. There are several serious MDMs. Of big enterprises I know of just one that uses jamf, and they augment it with many, many questionable bash scripts.
What enterprise management isn't chock full of questionable scripts?
Shit, my org has over 15,000 group policy objects that have been collecting, getting linked across OUs, and duplicated for over 15 years. The whole thing is questionable.
My perspective comes from talking to anyone on the Apple Business team at the San Francisco union square location, and also reps from apple's general business support line.
There are definitely a ton of other MDM solutions, but none that I've heard mentioned so frequently by apple employees as JamF.