Where did I say he wasted a scholarship taking Evans? You're just making things up. There's a huge glut of PF/C's on this team besides those 2.
Despite his high ranking, Evans doesn't have blue bloods all over him like they are for other similarly ranked players for a reason. That ranking is almost entirely based on what he could be and not what he is today, or will be even next year.
Evans is averaging 14.7 PPG, 10 RPG, and 5.6 BPG for a 17-13 high school team. Outside of blocks, those aren't dominant numbers for someone ranked as high as him, and even his blocks are down this year. Payne averaged 22 PPG, 12 RPG, and 2 BPG on a better high school team.
Against smaller lineups, which is what the majority of college basketball is, you're not going to be able to play Evans and Payne on the court much at the same time defensively because they're not quick enough. Offense will also be an issue because neither have range beyond 3 ft right now either.