We aren't.
Visual learners typically learn best by watching, then practical/hands-on people learn by doing.
Some people work best with verbal instruction, some by writing them down.
It's not that people are literally incapable of learning from methods that don't match their style, it's that different methods work better for different people, which is why mixed-method methodologies work better for teaching.
He/Him http://guidesmedia.ign.com/guides/9846/images/slowpoke.gif https://i.imgur.com/M8h2ATe.png
https://i.imgur.com/6ezFwG1.png