SH is not a mastering engineer. In the digital domain, he is simply an EQ adjuster. In vinyl, he is at best an EQ 'consultant' who must work with an actual engineer.
He is indeed an arrogant douche.
The SHF is the place where joy in music goes to die.
Hoffman was first caught stealing Buddy Holly masters and cutting them up. He got fired by MCA for that.
With DCC, there were issues with Ray Charles masters, among others.
By the early 2000's, virtually every major label banned Hoffman from obtaining or handling any master tapes. If a label was using Hoffman, no licensing. If the label found out about it later, the project was cancelled. Audio Fidelity quickly turned to KG, and Hoffman hooked up with a studio engineer who could get tapes (or, more likely, digital clones).
KG is older than Hoffman, but SH hasn't worked in a decade.