Bad questions happen. Sometimes, people give valid answers to the question the saw inside of a bad question.
The Help page for answering questions highlights that some questions shouldn't be answered:
Not all questions can or should be answered here. Save yourself some frustration and avoid trying to answer questions which...
- ...are unclear or lacking specific details that can uniquely identify the problem.
- ...solicit opinions rather than facts.
- ...have already been asked and answered many times before.
- ...require too much guidance for you to answer in full, or request answers to multiple questions.
- ...are not about governments, policies and political processes as defined in the help center.
Yet there is a badge for getting +20 on an answer responding to a -5 question.
Should it be the common practice of the SE to not answer, rather to correct or close bad questions, or hope a stellar answer arrives for bad questions?
To the question cited, it hits three of the five bullets.
"Does the overuse of the word fascism reduce its weight?" isn't explicitly about governments, policies, or political process.
It could be inferred what the question is asking, but that means the questions isn't inherently clear.
It closes by asking: "If so, does the word fascism denote a certain left or right political bias to you?" A direct attempt to solicit opinions rather than facts.
With those three facets, the questions requires a fair amount of guidance to answer it in full.