I addressed this in the rest of my post, which you did not quote.
Communication goes both ways. It is not exclusively the responsibility of the IDer.
IDers cannot know whether you just used the first CV suggestion or put hours of work into your ID unless you leave notes about your process. Many (not all) IDers will give an explanation unasked when disagreeing if they see that the latter is the case. They are unlikely to do so if it seems to be the former, because experience teaches them that many observers just want an ID and don’t care how it was made, so typing out a long explanation in such cases is not a good use of their time.
Sometimes IDers don’t leave an explanation even when you have documented your ID process, for any number of reasons, including that they simply overlooked your notes. As a rule this is not personal or a snub and it is not intended to be rude or unhelpful.
If an explanation is important to you, it is always OK to take the initiative yourself and ask. Most IDers are willing to provide explanations if asked (it can be helpful to check their profiles to see how they want to be contacted); like most people, we tend to enjoy talking about things that interest us and we appreciate other people showing interest in those things. It is also in our own interest to have better informed observers, because this reduces the number of IDs we have to correct.