I see what you're saying and while I don't necessarily disagree, I have to say that I don't think that comic quite matches your point. The comic is about the magic of crafted objects and how they reach their intended audience as well as the connections we have to those objects that might not be accessible or understandable to other people. Note that I used the word "objects."
What you are saying is that people treat other people like objects when they come up with criteria for the perfect someone, which is often the case. The nature of these objects is different for many reasons, but chief among those reasons in my view, is who crafts the object. In the comic, it is crafted by someone for another someone. In your post the object is a theoretical object projected on to a person, or to put it another way, "objectification."
This word, like the word "selfish" has negative connotations and not without reason. That those reasons tend to end exploration of the concept, is unfortunate, if understandable. That said, taking a step back from objectifying others is generally a good thing as it tends to create the opportunity to stop objectifying one's self too.