Yes exactly. Pointing a development effort towards a goal or in some direction is a very different thing from an Enterprise Architect dropping a bible of UML on a team.
It sounds like the problem is the rigid adherence to the original design, not UML itself.
Good, okay. I was worried that, because I liked drawing UML diagrams, I was somehow a bad engineer! Just keep being flexible, and I'll be in good shape.
Just last week I deleted a whole bunch of boxes on a UML diagram I had drawn because someone suggested a simpler approach.