Perfect markets have no time lag, everything happens instantaneously. Thus it is always in the perfect state. The real world is not that convenient.

Your claim that economics does not consider time lag is ignorant nonsense.

https://www.sciencedirect.com/topics/economics-econometrics-...

https://www.jstor.org/stable/2343782

https://www.bis.org/publ/confp04l.pdf

And? What does that have to do with the GP?

It’s a joke.

I can agree with him the mismatch is what makes me dislike the joke as it can spawn bad ideas but also what can make it funny in a "dark humorous" way.

Me not liking the joke doesn't necessary mean it's not funny :=/ Like a joke which makes you both laugh and feel bad at the same time...