What does it mean that people don't associate and look at the tiger's head?

It means looking outside, not inside. If you only look at the appearance and don't understand the internal situation, that is, you only look at some characteristics or external factors on a person's surface and don't understand a person's internal essence and quality, it is easy to be confused by the superficial tiger bees. The moral of this sentence is to know a person from his inner qualities and behaviors, not just from his appearance.