For wathever reason, some people are just better at analysing complex situations, systems and outcomes.

So when a proposal is tabled, they will point out non obvious shortcomings and unintended concequences.

This is not 'complaining'.

Neither does this mean you immediatly have to keel over and ditch the plan. Plenty of times something can succeed against all odds.

But smart management will take into account the information provided, rather tjan labeling it as something to ignore without furter thought.