It is not handwaving. You are not arguing that dumb people exist and that those situations can arise, you are arguing that they are frequent enough that the secondary market of electric vehicles should be looked upon with concern. Concern of the secondary market may be (and is) justified, but it is not derived from people forgetting to charge their car or even broadly abusing their batteries. What you're proposing is a set of nested if statements that result in a conclusion that requires a belief that people are broadly deranged and lacking in self-interest.
People will forget to charge their vehicles->They will do this exceedingly frequently->They will respond to this frequency of failing to charge by supercharging/charging their vehicle beyond the recommended threshold despite warnings->they will engage in that activity repeatedly despite warnings->they will obfuscate the excess degradation of the battery when selling the vehicle->the buyer is unable to uncover this degradation.
The incidences of all of those scenarios returning a "yes" is low, which results in the claim being of low significance, which is what I'm arguing. It occurs, it is not significant.
That is what this thread typically entails. An intention by people to accumulate as many "this is a bad news story/scenario relating to EVs" statements and then utilize that "bad news" as an argument against EVs whether or not it is unique to EVs or whether or not it is significant. I am not unaware of the irresponsibility/stupidity of people, I just do not agree with you on the frequency of it occurring or on the consistency of the response to that stupidity.
This thread would be significantly better if a higher proportion of posts answered yes to all of these questions:
Is this related to EVs?
Is it unique to EVs?
Is it significant?
Because there are relevant, unique, and significant issues related to EVs, but generally speaking the posts on this thread fail on both of those last two questions at too high of a rate and that kind of posting is generally not interesting. When either one of those questions is potentially "yes" there can be discussion about it. The most consistent poster critical of EVs following that hierarchy is Nortex, while I don't necessarily agree with his interpretation of severity or durability of a problem, the concerns he brings generally answer "yes" to all of those questions. The most consistent violator of that hierarchy is techno, who generally posts things that answer "no" to both uniqueness and significance, like a Cybertruck crashing into a sign. It is hard to discern if he does it intentionally or if he is totally unaware of how inconsequential 95% of the things he posts on this thread are.
Then the discussion revolves around how unique it is, how significant it is, and how resolvable the issue is. I have no problem reading criticisms or concerns, I have them myself, but I'm not just going to co-sign them as significant, unique, or rational just because an analogy can be made to another life scenario.