Yes, exactly the same is very difficult! But professional potters achieve that with ease. Once saw a potter in Japan who did at that at an astonishing speed and high accuracy. Looked very easy the way he did it, but is the result of thousand of items thrown over and over… he even did it without the help of measuring items, all by eyesight! Long way to go there for me…
That said, I kind of do not even want to achieve that, the little differences and imperfections make it more humane and lively for me
And yes we are all limited by the dimensions of our bodies. According to my teacher, some kinds of pottery can only be done by people with a certain size of arms/legs and strength (large jars and vases etc.)
