When people see an unusual sportsman who's highly talented (Player A), they tend to focus on his weak points. The reason is that when you see a highly talented player you automatically are going to compare him to other (proven) high quality players. So the question becomes: ''Can A be as good as those other star players?'' And that means a certain set of conditions, that are generally viewed as necessary to become a star, need to be met.
If A has a glaring weakness which prevents him from meeting those conditions, then that becomes a primary argument why A can never be as good as those proven quality players. In fact, since that weakness is so obvious, it becomes even doubtful if A will succeed in the league.
When there's a young sportsman that has one particular strength that's in high demand (Player B), but is limited otherwise, people tend to focus on his strong point. They acknowledge that B isn't supertalented and therefore lower the bar of which B has to accomplish. The argument becomes: ''We know B isn't a star, but B has one useful talent that will keep him in the league anyway.''
Now it's accepted that B will have (at least limited) success and people will start projecting other qualities on B that they would like to see as a bonus. Often qualities that can't be tested, like ''he can learn to do that'' or ''he has a great mentality''. The driving reason behind this is the same as for Player A, people want to see great players and aren't satisfied with the idea that a player isn't a great success or a total failure, nobody likes grey mice (I'm not sure if this is a common phrase in English, but it means someone boring/dull/average).
Only difference is that with Player (type) A they start with setting conditions, to become a great player (which aren't met unfortunately) and with Player (type) B they start with possibilities to become a great player (which are met), so Player B will be viewed more positive.
Players like Curry, Antetokounmpo, Jokic and Simmons (to a lesser extent) are examples of player type A that have had a lot of success.
I don't know whether Bol will make it in the NBA, and there's not enough footage for me to make a hard statement on him, but he's clearly very talented and the type of player that you could start to focus too much on his weak point(s).