I guess being conditioned that way may not be a good thing for ATC. They look for people who aren't too condtioned in one way or another as ATCOs need to be flexible. Working within a team environment also requires you to trust others that they are doing their jobs properly, otherwise the system would just breakdown. If you didn't trust a colleague who is handing over an aircraft to you it would just put more stress on you, and an ATCOs job is already stressful enough. Being able to recognise an error of another controller is essential but you need to trust that they will do the job right the first time until you find evidence that they haven't and then correct the problem. Just my opinion though.