Advice like the pile of leaves is finite. Yet for a finite thing advice always seems to be around. Advice has been around since the very beginning. This is a mix bag. People throughout history have always been giving out more bad advice than good advice.
People give bad advice if they want to manipulate a certain situation.
Lastly they give bad advice if they are truly ignorant of the situation that they are giving advice about. Advice is like a drug if you will. Some people needed to give it out. They can not help but add their opinion. All the time you hear, Well if I were you this is what I would do.