The idea that certain positions are more mechanically intensive than others is BS. It depends on the champions you play, not the position you're in.
You can play Maokai top and fall asleep on your keyboard---or you can play Gnar top and invest a lot of effort into the game.
You can play Eve jungle, ignore wards, and mash Q on people---or you can play Rek'sai jungle and play an intricate strategic game of map movements.
You can play Annie mid, flash-Tibbers every fight and never do anything else--or you can play Orianna mid and micro two individual elements while weaving between offensive, defensive, and utility-based playstyles.
You can play Caitlyn ADC and just right click from 650 range--or you can play Lucian ADC and combo spells efficiently while dancing at a dangerously close 500 range.
You can play Janna support and just sit on top of your ADC all game long--or you can play Thresh support and strike a difficult balance between aggressive playmaking and defensive peeling.