Would Kareem have scored more with a 3 point line? No, he wouldn't have. Would steph curry being scoring 29 a game right now if there wasn't a 3 point line? Not a chance. A 3 point line doesn't help everyone but it helps some.

For his career in the NBA ainge shot 50% on 2 point shots and 38% on 3 point shots. So he scored more per shot on his 3 point attempts than he did on his 2 point attempts. Doesn't necessarily mean that would be the case in college, but there is a good chance the 3 point shot would have helped him score more.