I understand the point being made my the OP. I myself love to learn more about IDing most of the time and there are certainly many taxa I am not to confident about and mis-IDing can happen. I appreciate it a lot, if the IDing person leaves a short comment when correcting me, as it provides also some information on how confident the new ID might be.
However, being quite active in IDing myself, I totally get that not everybody does that all of the time. My time is often limited and often I just ID some observations in between other stuff. Having to write even a short note every time I disagree eats a lot of this time. Not only because sometimes I have to think a bit about the wording in a foreign language, so I get my point across in a way, people can understand easily enough. But actually in many cases, especially where I only ID to genus or family level, I really would have to think about easily recognizable features. I ID species since many decades now, since childhood days and often I only have take a look and I simply know why one observation belongs to a certain taxa and not to another. I can not always put this easily into words as for me it is just this otherwise unuseful explanation of “general appearance”. So trying to explain my ID can take some time, when I have to actually think about easily recognizable differences between contradicting IDs visible in the photo.
If it is fast and easy, I often give a short remark, like “does not occur on this continent”, “only one species in this genus in your area” and so on… For some very common mistakes I encountered I have prepared some general messages I can just copy and paste. However, depending on what the initially suggested ID was, they might not always make sense.
As a person being corrected myself on my own IDs without explanation, I still find it rather helpful and only in some cases actually require more input. I usually just research the species and for example compare pictures of what I thought it was and what the other person suggested and try to find similarities or differences and go back to my own picture. In most cases that provides already all the information I need. In some cases, it doesn´t. In all of those I was easily able to get more information from the person that corrected my by simply asking. I think it is fair to assume that people really interested in the reasons for a certain ID can put some effort in… and at least ask, if they want to know. So far I never experienced anyone denying an explanation when asked. I certainly would not :-)