There are more reasons to use Lisp actually: the biggest one of which is, probably, that many programs become much simpler in it. But, actually, such argument

There are more reasons to use Lisp actually: the biggest one of which is, probably, that many programs become much simpler in it. But, actually, such argument is meaningless. The only meaningful argument would be to compare the pros and cons of using Lisp versus some other language for a specific field with some specific constraints. For instance, I won't be trying to use Lisp over JavaScript for writing Firefox plugins, but, probably I would use it over Objective C for this task ;)