Not having practised Aikido, but somewhat familiar with Lisp:

> it's considered very beautiful

Funny, I've heard it described as 'porridge with fingernail clippings', which doesn't seem to me like a description evoking a 'very beautiful' image.

> it takes a long time to become fluent in it

Not more so than many other programming languages. Of course, most people don't start with Lisp, so their frame of reference is off.

> it "expands your mind"

A fairly meaningless statement which is claimed of a great many things. Is Lisp any more or less mind-expanding than, say, marijuana?

> in theory it can "work on the street" but in practice people reach for other tools

What do you mean, 'in theory'? Lisp has been used, in practise, by NASA, for running a robot on Mars: <https://www.corecursive.com/lisp-in-space-with-ron-garret/>. If that isn't 'working on the street', then, by golly, that's a mean street you've got there.