"make a team gel" "bring folk together" "encourage team spirit"
Why are any of those unquestionably good things? I'd like there to be a respectful distrust, thanks, so that when one person fucks up, the others aren't too busy being "bonded" and "gelled" to do something about it.
I'd like there to be a respectful distrust between the people on the flight deck right about the time the commander decides to fly a perfectly serviceable plane into the ground (the morbidly named CFIT: controlled flight into terrain). I'd like there to be a respectful distrust between the lieutenant and his platoon of troops, right about the the time they start thinking about shooting civilians. I'd like there to be a respectful distrust between surgeons and their operating theatre staff, right about the time they start using lasers to sign livers. I'd like there to be a respectful distrust on a dealing floor, right about the time they start thinking about rigging interest rates to make a buck. I'd like there to be a respectful distrust between social workers, right about the time they start thinking that terrified half-starved children are "part of the black family script". And so on, and son.
Group think is bad. It kills people. Jacob Veldhuyzen van Zanten killed 583 people because his crew didn't disagree with him. I bet Lt William Caley had plenty of "team spirit" with his platoon, and look how that ended up. You can look my other examples up easily enough (Climbie case, in the last example).
The same applies anywhere that we implicitly rely on two or more pairs of eyes being used to check that people are being both competent and honest. The obsession with "team spirit" is how crimes happens.