To start of, let's not ignore how you decided to omit the lie of omission from your point by point response to my post. That is already quite telling of your tone, and could humorously enough be construed to be a lie of omission.
You are quick to dismiss my points as pseudo-philosophical without actually explaining why you may believe that, or what sort of reasoning you use to dismiss them. Regarding your example I can see that your threshold of lying lies at the definition of "direct lie," which is certainly the easiest to detect. However, there are many other types of lies, each of which serve important roles in the properly functionality of our society. You could easily discover this on your own if you didn't dismiss perfectly valid resources because at first glance they appear to describe "how to be a selfish dick and perpetuate misery."
For instance, you are quick to deem an accidental lie to be outside the scope of acceptable definitions of lying. For some reason you only consider something a lie if you are actually aware of it. However, while intention is certainly a part of lying, it is by no means the most important. A lie is simply an untruthful statement, regardless if you mean for it to deceive someone. I will agree that trying to correct yourself in these cases is certainly a remedy, but that hinges on you understanding that you have caused someone to misunderstand something, which may not always be the case.
Regarding your "hah, jk," will you honestly say that even in situations where it would be socially awkward or even unacceptable? "Thank you for the food, it was very good... hah, jk, that was one of the most bland meals I have ever eaten" or "You look good, that shirt does not make you look fat at all... hah, jk, you should go get liposuction." Going back to the point I made originally, lying is literally a core part of our culture, you may not even notice when you are doing it since telling the truth can often be amazingly insulting.
Presenting opinions as facts is probably just as common as the lie of exaggeration. It may be something as simple as presenting yourself as an expert when you are not; perhaps you have tried to explain a complex scientific theory without a full understanding of the material in question. Even if the actual content of your description is accurate, you have lied in acting as if you are a knowledgeable expert in the field. Or maybe if you are are asked to provide a design a work to replace an aging system, and you decide to do your work without actually understanding why and how the previous design functioned, and what limitations it was meant to overcome. Really, any situation where you act as an expert without actually being one qualifies for this category. Again, this is actually very common in the business world. You seldom have the time necessary to familiarize yourself with all the relevant material, yet cannot run the risk of appearing unqualified or incompetent by using looser terms like, "In my opinion X" or "I think Y" in place of "X is Y."
You are actually right when you say that you hurting someone with truth is unlikely to have happened so far, but for a wholly different reason than the one you present. Returning yet again to my original point, you are probably not even consciously aware of all the lies you say day in and day out, simply because you do not consider them lies. To you these things are part of your social strata; you say them because not doing so could be offensive. During your childhood your were exposed time and again to situations where lying was acceptable, you may in fact have been punished for not lying at times. That leads back to the point I was trying to make in my original post. You must be cautious when teaching a child about lying, since lying is simply a part of our society.