In dance it's pretty important to learn the basics well from day one. If you learn wrong technique it worms its way into your muscle memory and is difficult to unlearn and replace with something else. (It's also why the most basic dance classes ought to be taught by expert teachers, but that's another hobbyhorse.) And bad technique can lead to injury.

Other fields don't necessarily have a "correct" way, or they do but it's comparatively easy to replace a mistake once we notice it. In some cases, making a mistake and then correcting it can actually fix the right way to do it in one's memory. (Think of embarrassing mistakes we sometimes make when trying to speak a foreign language!)