Earlier quoted context omitted.
It is the HR-motivated eternal infantilization of the people. In fact, to the person who went through mental and physical developments with no blockages or traumas, it comes across as a quite paternalistic way of communicating, but it is a style liked and embraced by corporate coaches, HR, and the informal CYA policies.
I don’t think it has to be that deep. The world is a big place, full of many cultures that operate - especially with giving criticism - very differently. You don’t need to master the tone of every culture, but it’s important to at least be cognisant that even these difference exist.
I have lived for a few decades at this point and have noticed, like anyone else I imagine, a desire in (some, but a nontrivial percentage of) people to maintain lifelong ways of thinking and behaving that have been historically associated with early life.
For example, a desire to be praised and not challenged, to dress like a teenager even as one nears retirement, to show a degree of enthusiasm for pedestrian events that was once reserved for major accomplishments.