Kessler is very good. He has a lot of talent for sure. His instincts for blocking shots are as good as anyone in the NBA, but he doesnt have the elite length of Gobert or the elite vertical of other rim runners.
Like how many times has Walker put someone on a poster in his career? I like that he has better touch than your average rim runner, but at some point if you're 7'1 with a 7'6 wingspan and young, you should be able to power some dunks through people instead of trying to finesse everything.
I get that Walker is on a suboptimal team for his skillset, but the Jazz arent that bad at spacing. Does Walker really need to be on a top 5 3pt shooting team to be an above average finisher?
And here is the biggest difference between Walker/Gobert:
Gobert's career FTR is .718. Even to start his career he had a FTR of .639 in his first season of major minutes.
Walker Kessler's rookie year he had a .384 FTR. That is pathetic for a rim running big. This year it's an abysmal .218
The level of charmin softness you have to have as a rim runner and have that low of FTR means you are avoiding contact like the plague.