Are you from a South Asian country like me?
Hard lesson is you don't. It is nor because you are better educated than them. It is because of the mismatch of how you view this world.
Education under capitalism create weird notions like these, where one feel they are better because they got educated. As some other commenter said, everyone is stupid. You have some knowledge in a certain domain, and you process the world in that framework. The 'less educated' people have knowledge in some other domain. Even knowing how to work underthe scorching sun and keep yourself healthy itself is a knowledge that is hard to achieve. Maintaining your physical health and being able to do physical labour everyday, is something we the educated can only dream of.
The key point is there are more things out there than you know. Also the ratio is so skewed that what is know is miniscule compared to what you don't know.
If you are doubting the fact that you can learn new things from anyone out there, then you are in a wrong path. Keep the curiosity up and acknowledge and accept the differences among people. This is critical to have a nurturing world view.