Everyone's being unrealistic calling for everyone to be benched. Grant is not some panacea, but a freshman showing promise. He's going to have ups and downs, great possessions and dreadful possessions.
You're being unrealistic if you think a freshman who has just started seeing the court isn't going to look dreadful at times. That's what freshmen tend to do. Bailey makes his share of bone-headed plays, too, and he's going to be a lottery pick.
Grant is not going to carry this team. People calling for him to get 30 minutes, or whatever, are just reacting to the fact that the team is just not good this year and are desperate to grab on to any glimmer of hope.