This is used by non-lawyers who are seeking to avoid accusations of unauthorized practice of law and are not making any recommendation to the particular addressee of their remarks. -Wikipedia

Basically it's a disclaimer to avoid any potential issues, given how litigious some situations can get, it's best to be overprotective with any potentially legal advice

There's PLENTY if people ready to sue left and right (and attorneys happy to take their money) at the drop of a hat if they feel they have been wronged because they can't look at themselves in the mirror and say "yeah, I was an idiot on that one".

Have you looked at the "florida man" or "not the onion" communities? People are crazy.