I can't follow exactly what OP said, I can only guess that OP was wondering why Some style don't have fancy moves like the other.
I just have a question to OP. Are those fancy moves practical? Is MA for showing off or to fight? Do you consider this as "Performance arts" or "fighting arts" or more importantly "Art of KICKING BUTTS"?
I hate to keep bringing up UFC and MMA. At the beginning, they had all different styles competed in the Octagon. It only took to like UFC5 to literally eliminated all those that didn't work. Even after about 3 years when everyone got used to the ground game, you can see the technique are still very straight forward, no fancy stuffs as IT DOESN'T WORK!!!
Now you start to see more fancy moves in UFC like spin head kicks type, but it's still rare. If not because they have more rules today compare to the older days, I bet the techniques would be more simple like the older days. Those rules likely enable people to do fancier moves.
As for me, I am learning stick fight, been practicing over a year. When people show me videos of some fancy moves, I just acknowledge and thank them, watch them one time and that's it. Particularly I don't go to school, just practicing myself. I only concentrate on the most basic moves, I concentrate on how to swing fast and hit hard. I started learning escrima single handed swing. But soon, I found it's too fancy, all the twirling using a light stick. I changed to two handed swing using a 20oz stick, concentrating on body movement to add power. Last thing I want is to wack the opponent's knees and he look at me and say "OUCH"!!!! I learn to weed out all the impractical stuffs, stuffs that need a wide open flat floor that is unreal in real life situation. Places like in public area, restaurants where there are people, tables, chairs and other objects all over the place. I am sure in fight back in the older days, they had the same problem in real life. You try to do spin kicks that need a wide radius, flipping and jumping. Good luck in landing!!! All it takes is stepping on something or hitting something, that will throw you off balance completely and end up on the floor.
For weapons, it's the same, in confined place, you cannot swing wild, looking pretty and all. In real life, there are obstacles around you, you cannot do fancy twirling as you'll hit things. You have to be able to hit hard in small area. Using two hands holding the stick enables me to swing and hit in confined space. I even practice in hallway where it's narrow and swing hard.
If I want fancy artistic stuffs, I'll learn ballet, acrobat stuffs. If I want to learn martial arts, I want to kick butts. I want to walk away ALIVE instead of getting praises of the pretty moves.