What is the point of creating AMI's for EC2 instances that aren't backed by an EBS?

I was going to install a bunch of stuff on my EC2 instance (not EBS backed, just instance store) and then create and AMI from it.

But the documentation says:

If you create an AMI from an instance, the data on its instance store volumes isn't preserved and isn't present on the instance store volumes of the instances that you launch from the AMI.

So if I install php, nginx and use composer (php dependency manager) to install more things and then create an AMI off my EC2 instance it's not going to work because the data on the instance store volumes isn't preserved? It seems like I'm misunderstanding something here :)