You yawn when you feel lazy, and also, after you're tired working hard. The yawn is a yawn, but there's significant difference between the two yawns.
A person who yawn's for laziness will never understand the yawn of a guy who yawns after working hard.
In the same way, human experience should flow momentarily, with full awareness of the surrounding and the person in front of you. A person who is aware of the person in front of him will get to experience the human connection which other won't get to experience.
Most people who are into self-improvement try and skip that experience. They think that spending time with average people will make them average. So, they try and avoid normal people at all costs. But by doing so, sadly, they are missing on a great part of human experience.
It's way better to adapt stimuli for better human experience and make yourself comfortable with mediocre population than to ignore them.
However, it's very important that you don't get dragged into their mediocre sense of reality.
That's what separates people who constantly grow and fail to grow. Failures get dragged into normal sense of reality and always stay comfortable in it. Whereas, people who grow have their own sense of reality and push themselves forward.
A thing might serve two purposes, but the innate purpose will always remain the same. Yawn is a yawn, the difference lies within you. Either you yawn because of laziness, or after working hard. That's left for you to experience yourself.