>>I know plenty of people who can do basic 3d sketching with no specific instruction, but that's not me
I used to think that I am tone deaf and have no memory for melodies. Bu t after I forces myself to spend a lot of time singing, playing guitar and listening to music it occured that I just lacked some basic skills that combined suddenly creates magical ability of recalling melodies in my head and even repeating them. The same was with drawing and public speaking and general movement coordination (strength training can do wonders in this department).
This made me believe that some of problems of education system comes from general inability to convince students to spend more (dozen times more) on practicing basic skills (being this writing, small/big motoric skills, logical thinking oraz even some seemingly unimportant stuff like voice emission)