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.