I had similar thoughts and can recommend this video that helped me understand why the sharps/flats exist. It goes through a brief history of western music befor

I had similar thoughts and can recommend this video that helped me understand why the sharps/flats exist. It goes through a brief history of western music before harmonization was a thing, and then needing to introduce new notes in order to have perfect 4ths and 5ths. https://youtu.be/r7aQQQsvxho https://youtu.be/r7aQQQsvxho