You are absolutely correct. I have spent a lot of time around adults that can just pick up a brush without any training or whatsoever and do a legitimately good piece of art. Artist mistakenly feel that because they kept grinding that their output is a result of their work alone. However if they are missing that core piece of talent, it doesn’t matter how much they practice. You will never be able to create visual art at the level of someone with the spark.

It’s weird how all visual artists believe that this is true for singers, but never believe it’s true for themselves.