Hi James
I can only share my experience.
My experience is I used and abused pot as much as I did alcohol later on - both were about escape for me...both were about feeding the same monster...just a different variety of feed.
I tried to give up one and not the other many many times but it was kinda like giving up coca cola by switching to pepsi for me....I was still running away, still encouraging my addictions...when I was drunk I wanted to get high as well...when I was high I wanted to get drunk.
I had to give up both to really get free and change my life.
D