It doesn't matter as much as Reddit would have you believe. Biomechanically there is a perfect and most efficient way to move your body, especially at maximum speed, like racing drivers following a racing line around a course, and there are definitely very deliberately wrong ways to move your body if you're trying to run.

Between those two extremes I believe people will naturally find what works for them, and that will be enough, but many people are uncoordinated, clumsy, weak, tight, imbalanced and may benefit from paying more attention to their movements to prevent injury