It's a source of suffering that can be solved through genetic engineering of embryos that some group of people with resources will be inclined to address.
It is relevant because it precisely fits your criteria.
"If I understand it correctly, your objection is that it may be possible for some group of people to use this to increase suffering in an abstract way"
This is true of most objections to things that have a social impact.
Reserving health to the wealthy in a feedback loop of relative advantage does not seem very abstract - it seems dystopian.