The conversations will happen elsewhere and so will the relationships. Management is locking themselves out from the team leaders and suddenly those off site 'adult kerfuffles' are exactly the conversation you needed to hear to prevent exodus.
That's entirely intentional. You really don't want internal evidence of something that's going to be construed 10 years down the line as cancel-worthy, or worse, something that politicians/regulators are going to take out of context to attack you with.
