I don't think his shooting percentage is that unsustainable if he keeps playing like he is. He is very, very one-dimensional right now but its a dimension we need badly and one he is excelling at. A lot of his shots are off rebounds 3 feet from the net with the goalie out of position. If you get that shot off, its going in. Not knocking him. He is doing a ridiculously good job getting into that position.
Look at his shot and goal heat maps. Its almost all concentrated between and below the dots. He has one goal from distance. He has 2 more goals barely beyond the dots and at the inner edge of the circle. The rest are all below the dots and between the circles.
I'd like him to add more dimensions to his game. But with how he is playing this year, I'm not worried about an unsustainable shooting percentage. I am worried coaches may highlight him to box him out so he doesn't get those shots anymore. He may be one dimensional right now, but its a dimension we need. It's a dimension he could carve out a decent career with even with nothing else if he can keep getting in tight, keep getting to those rebounds and keep getting in the goalies face.