The answer is not so obvious here...in many cases learning about those things and then applying them in practice will lead to boring and predictable tunes. Why should I care about key centers? Why should I care about I-V progression and other classic rules? Only to repeat what others have been doing for centuries?Nanakai wrote: Do you think that it helps to learn about and hear musical intervals? What about rhythm and meter? Key centers and resolution? There are plenty of topics that, when properly understood, will lead to better music.
If something sounds good to my ears then...it's good. Whether it fits some theoretical 'framework' or not...who cares? I don't need to explain the inner workings of the tune to someone else and I don't think any "normal" listener would dissect and analyze the track instead of just enjoying it (or not).
Learning some theory is good...mostly to realise that you don't really need it to make beautiful music