Bam, Gobert, Ayton, Capela, Allen, Mobly, Embiid, Vuc, Jokic, Holmes, KAT, Turner (and Sabonis, but not technically a center), and Jonas Val are all more valuable than Nurk at the moment.
Comparison: McGee averages 15 min and gives you 10 and 7 for 5 mil/year. IMHO Nurk's next contract will be like 5 mil/year.
Al Horford is just on a brutal contract for Boston for what he delivers. Talk about paying CJ a lot...
Nurk is a good passer (at times a brilliant one, smh kind of passes) and defender, and can usually score when iso on a smaller guy. He is good at exploiting a weak defender but if help comes, he is frequently stripped of the ball. He's also slow, injury prone, weak finisher for his size (compare how he finishes to someone like Zion---godlike), no jumpshot, terrible ball handling, he should NEVER dribble. period.