If I found an answer with too much noise before the actual answer, I would edit it to have the solution up top as a tldr; and maintain the original content of the answer below it.
It may read like "noise" to you, but I often find that longer answers contain some valuable information and are usually worth reading if you are really trying to understand the problem. In addition, the person posting the answer probably put a lot of time and thought into what they were going to say, and simply removing all that seems like an unconstructive or even hostile action, and will likely be rolled back
So don't remove this information, but do edit the answer to provide a tldr summary at the top for people who don't have time to read through the rest of the answer.
As for the specific question you linked, I don't think it contains too much "noise", as it's only 6 bullet points. And about your concern that it looked like the bullet points were listing what you should do, the very first line is
The steps people usually go through when facing these problems are:
which I think clearly state that these are not the steps you should take, but are the steps usually taken by people in this situation. And honestly if someone follows a set of bullet points found online without actually taking the time to read any of the other text, I think they deserve whatever they get ;)
But anyways, I suppose you could also edit that answer to add the solution to the very top of the answer so there are no mistakes, but I wouldn't remove any of the existing answer.