/ic/ - Artwork/Critique

Out of curiosity, how much accuracy/control can you expect to have with "shoulder" movement in the nw-se intercardinal directions once you have good proficiency/muscle control over your shoulder? I always felt the shoulder to be awkward(obviously cause i don't use it) so i often just defaulted to wrist, fingers, and elbow. Now, as im trying to diagnose my horrible line quality problems and start good pencil control habits, I've realized i have barely any nw-se control and all of any such lines i solely make with the incredible short range of my fingers, which is probably a heavy bulk of my line issues. But as i try to adopt shoulder use it still feels fucking awful, like trying to draw with my other hand. It also doesn't seem like i'd ever have nearly the same speed or line throughput as i do with the reverse sw-ne options of wrist and elbow. And I feel like if it doesn't then the only options left to reach control/speed parity in both intercardinals would be to draw ambidextrously or flip/rotate your surface which is something i already kind of hate doing.

So if you're a beg who actually draws, are you able to make really clean straight lines in nw-se intercardinal? Can you do really tight/fast shading or hatching too(fingers excluded of course)?