> but you can establish trust with managers.

This is technically true, but metaphorically false. Most readers, especially the younger crowd, are likely to be too trusting and not correctly recognize fundamentally adversarial relationships, like with their boss, with HR, with lawyers whom they don't pay personally, etc. Especially when those people present the relationship with a faux version of the same naivety that they intend to prey upon.

The only people you can trust at a company, are people who have demonstrated that they value your relationship more than the company's relationship. That's not impossible, but if they really need the salary, then the odds are stacked against you.

It's certainly nice to pretend that everyone is nice and trustworthy. In fact, most people will hold it against you if you don't sufficiently pretend to be trusting. Universal insincerity is part of the human condition.