Skills to lack….
Concentration on tasks at hand
Inability to quit texting
Visual (blind spots, legally blind, cataracts, tunnel vision etc) limitations
Hand, eye, feet coordination
I’d be inclined to say its has as much to do with character flaws rather than skill sets-
Some things just come naturally to people than others also: I.E: my roommates a fighter- I’m not- I’m a dancer. Fighting comes naturally to her- she’s quick- has good judgment and lightening fast reflexes that traininly only enhances what comes naturally AND her character makes it a good fit. She’s agressive when she needs to be and confident but not overly assertive as a whole.
I’m agressive but in the wrong way and I don’t read people’s bodys well when they go on offensive and it gets me into trouble. I can on the other hand transmit emotion through dance where she has no ability for that- I have good balance and smooth transitions from one thing to the next.
Both of which take a lot of training to bring the best out- but we have characters that FIT what we do.
I suspect a lot of people don’t take all the factors into consideration.