They are using some super small sample sizes to draw conclusions right now.
However, he hasn't had difficulty scoring from back-to-the-basket positions, having converted 13 of 18 attempts.
You cite this number and start talking about points per possession in the post but 18 attempts is a meaningless sample size for this purpose. If he was shooting in the post 5 times a game (not a large number), we would be talking about 100 attempts not 18. When he is attacking in back-to-the-basket situations less than 1 time per game, it is fair to say you are cherry-picking the favorable matchups / situations where he is of course going to have great numbers. This isn't a negative for his production but pretending that it is a meaningful comparison to guys who were efficient in high volumes is silly.
The iso / ballhandling comparison is more apples to apples in showing that he is a different style of player from the big men that he is being compared to and that he has been very successful in those situations. The question then becomes more of how he will fare with stronger, larger, quicker defenders in the NBA where he doesn't hold the same degree of physical advantages that he does today. This becomes even more important when looking at his suspect jumper. Some strange notions on his jump shooting in the article where they note he has shot significantly worse on jumpers than other bigs like Davis, Embiid, Simmons, Griffin, etc. but draws the conclusion that it is positive because "he is making more jumpers" (i.e., he has taken a larger volume of shot attempts). Given inability or unwillingness to operate in the post, it is not surprising that he has taken more attempts but I would say that shooting 50% on .5 jumpers per 40 is better than 28% on just under 1 jumper per 40 even if the volume if higher for the latter player. His mid 60% from the FT line is a red flag in this area. We've seen guys overcome this so not a deal breaker but you need to see a path for that development.
These two areas capture the biggest question about his game in a nutshell. If the guy isn't incline to post up and can't shoot a jumper, that leaves him largely driving to the basket in the half-court game and I expect he will be very effective doing that at the pro level and his ability to pass the ball will synergize very well with this. However, it is hard to see him sustaining the same level of efficiency and volume that he can put up doing that in college once he is matched up against better, stronger, larger athletes so he will have to start figuring out how to operate out the post or (more likely) develop that jumper to reach the potential that whoever drafts him #1 will need to see in him. Especially if you are making the case that he could be the best prospect in a decade.