They argue it is not vital, as though urgency were a switch you may shut with a shrug. The sentence drifts into rooms where plans are fraying and hearts are racing. It resembles a doctor gently turning a graph or a manager purchasing time; it sounds tranquil, nearly sagacious.
Still it has a subdued energy, a permission slip to stop, to breathe, to choose patience above fear. Not critical implies the clock continues to tick but is not yelling. It means that one can have sleep, communications can be postponed, and errors can be fixed.
It's not still a justification for drifting, though. Make the critical works. Tell us what you pass over. You will look poised, stable, and make it clear, bravery, and silent will when it turn essential.