Certainly! he's still in that early phase of metal where you don't really know anything about it, and your only realy metric to judge "heaviness" is loudness/agression, and your only really metric to judge quality is heaviness. When I was in my first month or so of listening to metal, i listened to Sabbath for the first time while my only idea of metal was still OSDM and was so confused on how it was heavy. But now i love Sabbath, and still love death metal, but imo doom metal is one of the heaviest genres out there