Because people in this thread are attempting to put-forward lisps' macros (and writing code as an AST) as some big win, without acknowledging that it comes with a massive cost. Lisp-y, inexpressive, paren-soup syntax. I'm saying myself (and presumably many others else lisps would be more popular) don't buy the trade-off.
If you like it, and your team like it then great. But don't act like it's definitely win-win, and people who choose not to use lisps just haven't achieved enlightenment yet.
But Lisp's syntax is actually pretty expressive and nice, once you get used to it, IMHO. You continually deny this, and while you're free to disagree (many do), you continually argue that the mine and other's opinions are Bad and Wrong. I find this frustrating.
I don't agree with them however.
What I'm arguing is that Lispers say that all the parens and lack of other, more expressive constructs are worth it because you get macros. I'm arguing that's a bad trade-off, because 1. that's a big sacrifice, 2. macros aren't a win.