My brother was a valet for many years.
Your instincts are correct...don’t let a valet drive a high dollar sports car.
I heard my Shelby GT 500 KR SCREAM through a parking garage once. I was PISSED!!
My brother was a valet too...many stories of running Ferrari’s and Porsche’s down a quarter mile strip behind the 1/4 mile strip behind the hotel in Annapolis, MD. Now he owns the fricking cars...God bless him...he always knew what he wanted...