It's quite an entertaining rant, but the scattergun approach means that it's one of those things where it's impossible to address the points made because there's so many. But to just look at the first paragraph:

"There is only so much space available in a city."

Is there a limited number of possible LISP practitioners in the world?

Looking at the broader point: yes, there are a lot of factors to take into account, but perhaps we should be looking at the factors that specifically involve LISP.