In my experience as a designer, I feel that if there are problems that I think can possibly be solved through design, then I have a responsibility to help try to solve those problems.
With that said, over the course of my career I have had many clients and even other designers ask me questions regarding image resolution and/or print quality. I believe a possible reason behind this phenomena is that this topic is simply being rushed through or omitted entirely from most design curriculum (however I hope this is not the case as I feel it would be doing today's future class of designers a huge disservice).
Regardless of the cause, I felt that there was a need for some sort of simple visual resource for creatives to help explain this topic, which resulted in the creation of this infographic.