When we watch competent people dance what we are observing is them demonstrating a skill that they already have. This skill was acquired through a process of training which was most likely progressive, that is, involved a series of steps whereby they started off with no skill and then progressively acquired the high level skill that allows them to dance in a complex way skillfully.
This is important because many people seem not to realise that what you do in the process of training is going to be very different from what one sees when dancers demonstrate their skill that is the result of the training. They see skillful dancers do a certain pattern of steps or some movement, and they want to learn immediately how to do that specific pattern or movement.
They want to learn that without apparently taking into consideration that they are not themselves at the level to be able to execute that pattern or movement, because executing it would be a matter of demonstrating a level of skill that they do not have. I think that the reasoning is that learning the pattern of steps and movement then just requires a lot of practice of those steps or that movement in order to acquire the skill.
This, however, is a major confusion about the relationship between training and demonstration of a skill. The pattern of steps or the movement is not the skill itself, but a demonstration of skills that are distinct from the pattern. By analogy, one does not learn to drive fast by driving fast. One first has to learn to drive slowly, and then progressively faster. One does not learn to beat champion chess players by playing them from the start. One has to go through baby steps.
Similarly, to execute a complex set of movements skillfully one has to first practice executing simple movements. These are not going to be the eye-catching choreographed sequences that one sees performed by champion dancers who the teach them. Trying to execute these complex patterns results in the acquisition of poor habits. Performance of sequences therefore is the demonstration of a skill that was acquired through training, and training is not merely the practicing of the performance of these skills but a completely separate process which is progressive and culminates on the skill demonstrated.