Generics are dangerous

Generics are bad and complex and we should not have them.They make my head hurt. I don’t like complex. I like copying and pasting code and adjusting types. I like macro’s. Just like in 1981. You like generics? You support BUGS in CODE.

I like macro’s

I know that you are being ironic, so, I ask of thee, art thou mankind why do you hate macros?
Generics are a subset of macros, in most cases at least. Consider for example:
(define-macro (f t) `(lambda (x : ,t) ...))
and
(define f (lambda (t : *) (lambda (x : t) ...)))