“Difficult” is a relative term. They were saying it was a difficult concept for them, not you. In order to save their ego, people often phrase those events to be inclusive of the reader; it doesn’t feel as bad if you imagine everyone else would struggle too. Pay attention and you’ll notice yourself doing it too.

“Ignorant” is also infinite - you’re ignorant of MANY things as well, and I’m sure you would struggle with things I can do with ease. For example, understanding the meaning behind what’s being said so I know not to brow-beat someone over it.