Good point - I think that the approach this trainee took would be welcomed at some companies! This particular company just wasn't one of them.
And while I'd personally rather work for an organization with a culture like the one you described, the reality is that failing to consider what is expected by senior leaders within the specific company culture you're a part of can have real impacts on your career progression within that company.
If you don't care about progression, or about staying with the company, then that might be fine. If you're looking to advance, it might make more sense to cultivate an understanding of what's culturally accepted before making a bold move like the one in this story.
Thanks for reading and commenting, Michel! Sounds like your employees are lucky to have a leader that believes this - "They spend a lot of their lifetime helping my achieve my goals and my dreams. What can I offer them in return?"