If you can't understand what people are trying to say, I recommend trying to experience it for yourself. Install Common Lisp along with Slime for Emacs, and try things out. Or try out a Smalltalk environment like Squeak or Pharo which would also give you the same "enlightening" experience.

I know you are skeptical because python has a repl too and so it is hard to see what these "live" environments like lisp/smalltalk are offering. But trust me (and the others) that there is more than what python offers.

I have written python professionally probably more than any other language I have used, so I'm not ignorant of python btw.

No one is trying to fool you. But you don't have to take our word, please try it out for yourself!