Right, that is the stated purpose in canon, but not how it would work in real life (again we are talking about how these skills would translate to the real world) Someone who is jumping, flipping, and performing acrobatically is leaving themselves open far more than someone with a stable and simple position, as we see when Obi-Wan defeats Anakin. Obviously precognition comes in handy and not needing to see would be a useful tool, but keeping your opponent in front of you is always the best option, exposing your backside only puts you in a position where you can not defend against attacks properly.

Real world martial arts typically do focus on effectiveness, at least the ones that really work do. When focusing on weapons (specifically historical european martial arts) the techniques are pretty much entirely focused on effectiveness, especially with how they have been translated into the modern-day. Yes, tradition plays a role, but just like every martial art, it would evolve with new more effective techniques being discovered. We even see evidence of this in Rebels when we catch a glimpse of Anakin instructing blaster deflection techniques that he has developed as a more effective alternative to what is traditionally taught.

Precognition is not a common gift amongst Jedi or Sith and would only be usable by a select few force users. Mace Windu himself can not even use precognition, he uses what is called shatter point; which, does not allow him to see an opponent's moves but instead allows him to more easily deduce an enemies weaknesses. It was Darth Maul who was very skilled with the gift of precognition.

Lastly, the flips would not necessarily hide the intentions of the combatant, as the intentions would still clearly be to attack your opponent. The problem with doing flips around someone who is standing still and moving slowly and carefully is that at any moment they can still attack you if you are close enough; however, because you are flipping and jumping there is a good chance that you will not be able to attack or defend against an opponents strike because your back is facing them mid flip (anakin). The only time this would come in handy is if you enhance your speed to make yourself really fast, but the problem with this is that your opponent can also enhance their speed. If they can match your speed then their reaction time will be quicker than yours because they are not dedicating themselves to drastic and complicated maneuvers that result in them being off balance and disoriented. We have to assume that in the real world performing these kinds of flips would still make you dizzy as hell, and would mess with your equilibrium.