THAT ONE who knows it all

I looooove to chat with people and mingle around, knowing different characters and unique personalty. However, i am really depress IF THERE IS THIS ONE PERSON WHO TALKS LIKE HE/SHE KNOWS ALL even if we talk about something very personal like somebody's health condition. 

If someone is sharing her/his story to others, it is NOT POLITE to criticize his/her decision as if you and the speaker are sharing the same body and experiencing the exact same pain the speaker is feeling. [When obviously YOU ARE NOT].

IT IS RUDE to dissed people and act like what the speaker experiencing is no big deal and whatever option the speaker decides, as an excuse for him/her to escape their self. 

You know, when this person starts to talk the words are not even close to your queries. yet, this person keeps talking like this person knows it all. It's like this person is controlling the world and nothing escapes of this person and there is no "out of control" / "unexpected"situation for this person or so, i think. 

I quickly realized, there is NO WAY this person could be a good listener. 

An advice to that person;

You NEVER know what will happen. We are not sharing one same soul that feeling the same great pain. So I don't think you should make the live or die decision for someone else. You DON'T KNOW ALL THINGS. Stop acting like you are always right and others are not. You may have the upper hand and lucks but we deal with different situation EVERYDAY. So, one 20 years ago story cannot be adapted to nowadays situation or even today's situation because GOD created everyone differently. And. everyone should respect each other decision.