I think it's a bit disingenuous to say that such dislike is nailed to Lisp. Mixing data and code in the memory of a running program is what has lead us to every exploit involving a buffer overflow or a stack smash.

I expoect a different class of problems in their place but self modifying code is rightfully highlighted as unprovably correct.

Lisp is not the only language that can build a string and throw it at an eval function.