Training changes what a person is able to do. Culture work changes what an organization makes it safe, possible and worthwhile to do. Those are two different problems, and they fail in two different ways.
The fastest way to tell them apart is to ask one question about the behavior you want: has it ever happened here?
If it has never happened, in any team, under any manager, you may genuinely be looking at a capability nobody was ever taught. That is a skills gap, and a well designed learning experience is the right instrument for it.
If it has happened and then stopped, or it happens on one team and dies on the next, the capability is already in the building. Something is suppressing it. Teaching it again will not release it, because the constraint was never knowledge.
Most leaders I sit with are carrying the second problem and shopping for the first one. It is an understandable move. A training has a date, a price, an agenda and an end. A systems problem has none of those things, which makes it feel unmanageable, so the calendar quietly becomes a substitute for the diagnosis.
What follows is how to tell the two apart before you spend the budget, because the wrong instrument does not simply fail to help. It costs you something you are going to need later.