you'll die violently if she find out you are behind the dissapearance of her hairbands. (At least that would happen to me)

You don't even need to be behind the disappearance to be eligible for the death penalty. Even if it wasn't you... somebody's gotta pay

The part that the cost of changing software is unknown, ignored and fixed is not true anymore. This is a thing I realized recently.

A company cannot get free (o low cost) software changes anymore. Someone invented llms and they charge by work produced (useful or not)

So a PM cannot "save" costs by pushing. The employees will resort to their agents and there will be cost. If there is no agent, another company will beat them. So now a change has a measurable cost and even you can calculate in what was spent (agent logs)