Yes. I reached college with 24 AP credits and a 31 ACT (never touched the SAT) 5 years ago and I did barely any homework (~1hr/week total). Instead I played a lot of video games, and when I was 17 taught myself how to program C++ to mod Civ4. I could never have learned programming had I not had tons of free time.

Homework is evil because it's a massive opportunity cost in terms of time.