It’s not JUST playing consistently though. You also have to have a good sleeping schedule and just in general be in good health.
I’m always tired. Literal insomniac. I’m never at 100% 
I’m better than a Gold or Plat. Just worse than your average GM. My normal accuracy in my own lobbies is 30%. Average for GM is 33%.
But with Widow you have to hit the head both times. Cree can fire at the body and hit the head, then hit the body. That’s almost all of my headshots on him tbh, since I don’t aim for heads.
I don’t normally flick. And I know how to hold angles, as an avid World Trigger fan. It’s just that people never walk into my crosshair. My positioning isn’t very good.
It is, because it’s just taking care of yourself and playing consistently. However, I’m comparing Widow to other hitscans. Widow is just harder because more aim requirements.