As the saying goes, "Strong liquor scares people", which is a common saying. How to understand it?

Too many TV programs and real scenes show us that many people will do things and words that they dare not do after drinking, indulge themselves and let alcohol stimulate themselves to be completely chic. In fact, they just want to say something, but they have no courage and need to cheer themselves up. It's not necessarily a bad thing. For example, if you really like a girl and the other person knows it, but there is still a piece of paper missing, then you need the young man to be bold and brave. He is usually a low-key introverted person. You're really embarrassed to let him talk. But if you come to that cup, you may get a love.