The company for which I work seems to be run by engineers. When learning to be an engineer you're taught that doing nothing is always a valid option. In Army leadership courses we were taught that ANY decision is better than NO decision.
My company is stifled by a bunch of engineers in leadership positions who always choose to defer up the chain rather than make a decision themselves.
As another commentator said "do nothing" is a decision. There's a distinction between "don't make a decision and hope someone else makes a decision" and "we acknowledge we're deciding to do nothing about X until/unless Y"
The people in leadership positions should be active participants, and not all decisions will be ones they are are able to make locally - but they should feel comfortable to present a POV and recommendation/tradeoffs upwards when that's the case. If the buck stops with them then they should be aware that "do nothing" is a decision that they are making.
The person who decides owns the risk. The cost of waiting is spread across the whole team, so escalating is usually the safer move for the individual.
“Do nothing” can be a decision