Welcome to the first fundamental Principle of Technique!
Posture is referenced a lot from an aesthetic point of view, but it’s functional importance is MASSIVELY undervalued! Think of it as a framework forming the foundation for literally every movement we make. If it’s not patterned properly from the get go, it poses a hefty challenge not only does it create issues further down the line, it can pose quite a challenge to fix.
Imagine trying to repair a table with everything still on it… It’s going to be quite a kerfuffle keeping everything balanced and in order! Build a solid base to begin with however, and not only will you avoid the hassle of repairs, it’ll be able to do everything it’s supposed to in the long run without difficulty.