This our information age is our un-doing

So many people these days are know-it-alls. It seems after we discovered that nobody knows everything we went ahead and become the nobody. People these days have no respect for others knowledge  or expertise. Somebody will be so quick to criticize another who's field they know nothing about. Some even go ahead and argue where they don't have facts to support their knowledge.
There are a few reasons in my opinion that lead to this ,

1. Listening to others speak and taking their words as your source of information. This is common along jobless corners, at the stage, in a mat or at a local.
2. Looking at pictures in a newspaper. Barely reading the stories or sometimes reading newspapers and adopting a writers point of view in a subject.
3. Ego cause you think that since you're an authority else where then you are everywhere else.
4. And lastly guesswork. You just wanna flow with the conversation/debate and so you keep putting your 2cents.

The information age it is, wikipedia is filled in by us and so we're the people with the knowledge.. Okay, but stick to what you know and you're sure of.