don't relate to on field/court performance, some teams are going to worry about the distraction hurting the team's performance. Coaches and teammates didn't want to deal with hearing about whether or how Tebow was playing. Kaep's off field stuff annoyed a big chunk of the fan base. Right out of college, Jimmer had a legion following him everywhere and demanding to see him play. All three created distractions that were too big for some people to want to deal with.
In Jimmer's case, as I said before, I think things have died down enough. Furthermore, I think he's a good enough teammate those kinds of things could be minimized.