All addictions to drugs or alcohol are about blocking out reality. There is something in life or in the past that you do not want to deal with or remember.
Pot will damage your liver and your chromosomes over time. It reduces pain by dulling nerve receptors that eventually are destroyed. Not a good choice.
There are a million things, people and episodes in my life that I wouldn't mind forgetting or at least block out for a while. If weed helps me do it, I say bring it on

It does help me relax and I'm very, very tense all the time, so I don't mind if it shaves a few years off my life. Plus, life would be too boring if you did only what is good for you, lol.