Every question is about advice: it'd be akin to tagging every question with help or this-is-a-question-i-assure-you. I would speculate the vast majority of questions tagged advice are there because of misuse of the tag box (e.g. typing "career advice" instead of "career-advice").
So can we kill advice with fire?
A year later the tag is still here and is still a fan favourite (100+ questions). Can we please burninate and blacklist it asap?