The players only do what they feel they can get away with.
People have this fervent need to want to attack players, but players play & Coaches coach, the responsibility lies with the coaches to get the players to respect practice & give maximum effort. If guys aren't practicing hard it's because the people responsible for keeping them in line haven't done their job.
You think Saban, Dabo, or Lincoln Riley has to pull teeth to get guys to fall in line & practice hard? No, because those players know if they don't they won't see the field & will be immediately disciplined & replaced.
Our fans think Chidlren are supposed to raise themselves while parents sit back & take credit for it, don't work that way... If your kid is bad, it's because you didn't raise'em right, it's really that simple.