Why learning may be difficult

I have several friends who are very good at some art or craft but are unable to teach another person because they can’t imagine themselves back at the beginning,not knowing how to knit or read
Teaching is harder than we think.
And how would you tell someone [in words] how to write a bicycle? Do you think that it would make them able  to get on and expec cycle away? NO!
Some people have blockages.I was with a person who asked me to explain the difference  between 0.1 and 1%
It was a disaster.I literally felt a force pushing me away.So I told her to find out some other way.And  she says I am very gentle………
Teaching is harder than we can imagine.In the last case, I had not been able to reach her where she was.I didn’t  know why she asked.
Some teachers are cruel.Perhaps they dare not imagine being a beginner again,