I think it would depend on the abilities, talents, and personalities of the individuals involved. Also their desires. I always wanted my father to teach me piano but wouldn’t or couldn’t or didn’t want to despite playing at a professional level himself. I guess he didn’t have the patience or desire or couldn’t remember the progression. He preferred to pay for me to have.violin lessons! I finally learned piano after inheriting his piano and taking lessons. Before that I could only pick out simple tunes in treble clef. I always thought he could have bought instructional books and helped me a little, but he didn’t. I did learn to love classical music and have wonderful memories of his playing, though.