Wasn't as good at shooting/finishing as he should have been even before the injuries. This was an era in which the best players could get over 60% for True shooting since 2 pointers & FT's were where it was at. For a 7-4 guy to be below average for most of his career was not good, to say the least.
I encourage everyone here to call me out if I’m wrong but from the games I’ve seen, the closest player comparison we have today is Victor Wembanyama. I fully believe if Sampson played in the modern era he’d be working on his 3 point shot the same way Vic is. Sampson would often push the ball up the court the same way Vic occasionally does. They’re both tall, mobile aliens with amazing defense. Sampson doesn’t get enough credit (in general, around here he does).
