"Is the single most important thing" is plainly hyperbole. For instance, that statement cannot be unconditional. If a bus is barreling towards you, the single most important thing is to get out of the way of that bus. No time to measure it, measure its velocity, calculate the rate at which you need to move. The single most important thing is to get moving now.

As a mathematician, I read that headline and say "what are your axioms?" And that's a quantitative response to that qualitative headline, so no apologies.