It's a great moto if it's appropriate. Many companies don't have important data and aren't critical. The great thing about 'move fast and break things' at Facebook was (i don't think they use that anymore...) that it was explicitly what they wanted to do + the downsides they would accept for doing so. An equivalent at a bank might be "be secure and move slowly" - notice how no one says that, ever? They can't stomach the tradeoff they actually need to make. Whose engineering function was more confused as to how to proceed? Early facebook, or Wells Fargo?

Being explicit about what you want and what you'll give up for it is a nice thing.