That should show you how afraid people are of the technology that they are trying to look at anything that can make it fall, but as some people have stated before that is not really an issue
Whether they are afraid of that or not, I don’t think it’s wrong to point out something bad that’s going to happen in the future if there are no actions taken to fix them. Imagine that those who discovered the bug decides to keep calm and say nothing about it, those developers in the future wouldn’t know about it and by the time they might get to realize it, it might be late to fix. It’s best that they are aware of it, at least they will be at alert.
You will be right if this was a new bug and no one was aware of it but this is not really the case, the developers have known about this for a very long time and there is no reason to think that they could not fix it during the next years if that is what they wanted, but the date in which this will become a problem is so far away that there is no point in doing it now since they have so many other important things to do.
As such it is obvious that anyone that brings this point is doing so in bad faith and they want to scare people away from bitcoin, and we need to wonder why would anyone do that? And that is obviously because they are afraid of the potential that bitcoin has now and that it will have in the future.