These sound like good ideas. I guess I just don’t work in such companies and I think this is the norm unfortunately.
There are strict timelines that span months if not years, often optimised to a large extent. There is little room for spontaneity and organic projects to come up.
I've worked at companies where this sort of thing is encouraged, and others where I'd be afraid to even ask about the possibility of doing such a thing. Naturally it's a spectrum.
(Although, there is also the company that claims to encourage it, and then buries you in bureaucracy...)
