He is a very talented artist who both writes and performs his own music. What do YOU do?
He is clearly not Pavarotti, but is not supposed to be. It is Rock 'n' Roll, in the tradition of Chuck and Jerry and Roy and Elvis and so forth.
AND, he recorded STAND ON IT, which is one heck of a rock tune!
Cheers, and good for him. (My daughter went to college with his son, who dropped out to become a firefighter, FYI.)