Which breeder is this? I would say that chameleons are naturally shy animals. I don't think it's a good idea at all to deprive him of places to hide, because this could also make him more insecure in the long term. Most lizards, even the more 'sociable' or gregarious ones need somewhere they can feel hidden or they will be stressed. This is not just about how comfortable he is with people, but about his health and lifespan.