It's not correct to say "draft express is saying (present tense)" Froling is compared to Jokic and Kanter. Said... three years ago... would be more precise.
Draft Express no longer operates, the article was written in April 2016 when Froling was a junior, coming off a strong showing at the Hoop Summit. All youngsters get comparisons that would wildly diverge from where they ended up ~3 years later.
Any reasonable projection now would be different. I can still see him cracking an NBA roster at some point.
Green, Maker(s) Humphries, Landale, Sobey all have some degree of a chance. Cracking the NBA is not the great white whale it once was.