This is the same criticism Willie Mason had about Aiden Tolman. You probably wouldn't consider Cam Murray a good prop either. But these style of middle forwards make a ton of tackles, make metres through the middle, find their front foot and get a quick play the ball.
It's not as flashy as winding up and smashing into the line sending people flying like skittles, but it's an important when it comes to laying a platform for the rest of the team to play off the back of.
Personally, I reckon you need a mix of both types of props, like Potter did when he had Marty and Gavet coming off the bench as impact props to replace Woods and Galloway.