I think sometimes, we put too much stock in the catching of the fish as the most essential part of the enjoyment of fishing. He may be fishing with worms and other plastics the way he wants to fish, whether it means it will catch him bigger fish or not, for example, I'd rather fish a super spook junior all day, catch 8 fish and witness the explosions, than fish a carolina rig and catch 20 fish. My partner essentially refuses to flip, unless in a tourney, because he just doesn't enjoy it. yes, he knows he can catch fish that way, but he doesn't find it to be very fun.
now obviously, for tourney situations, all bets are off, and you gotta do what you can to get in the money, but if this guy is mostly fun fishing, and he most enjoys the techniques he uses, and the thrill of the catch on them, then there is nothing wrong with that.
I've caught over 50 fish on an xrap, several times, but one of my most memorable days was 20 fish on the stick marsh on top water. its jsut all about how you enjoy to fish.