Let's be honest; if Bama wants him, he will go there.
The thing is, Iowa State and Bama offer completely different things to a young QB.
Bama is obviously where you want to go to win titles. Period. If you get on the field and play well you will make it the NFL as well. But that "if" is the big thing.
ISU offers something different. A great young QB will have a lot more chance to get on the field at ISU than at Bama where they will be competing with other 4 and 5 star QBs being brought in EVERY year. The NFL exposure wont be as great at ISU, but if you are good enough, the NFL will find you. ISU also offers the opportunity to do something really great. A lot of QBs have won games and titles with Bama. To be the kid that takes ISU to a new level of success is something special. I believe this staff is selling that opportunity. They are young and enthusiastic and their success so far in recruiting has shown that.
There is honestly NO guarantee that Purdy would ever play at Alabama. Jalen Hurts, while maybe not a superstar, is a great QB and has won a ton of games. He'll be a Junior next year. Then you have the 5 star soon to be Sophomore who just won the National Title game in Tua Tagovailoa. He's probably going to get better and play for two more years at least at Bama. Bama is also going after Tua's younger brother Tau, who is just as athletic. He's class of 2019. That's not mentioning whatever other 4 or 5 star they will bring in over the next few years.
I understand that high school stars are confident and think they can beat out anyone and earn the job, but you also have to look at the facts that more star talent makes it a lot tougher.
Brock has to decide what he wants more, the Bama shine, or the real chance to play, and play more often.