Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.

Even if your less into design and more into content strategy you may find some redeeming value with, wait for it, dummy copy, no less.

A client that's unhappy for a reason is a problem, a client that's unhappy though he or her can't quite put a finger on it is worse  images.

It might be a bit annoying but you could tell them that that discussion would be best suited for another working towards the final goal.