From having 3 pot smoking friends in the house, one of which just spent a stint in hospital, I've learned that if you are going to smoke that frequently get yourself a vaporizer it will help save your lungs. It's not as bad as say smoking a pack of cigarettes a day but you ARE inhaling smoke and almost all the other nasty things you'd get from a cigarette. The difference really is the quantity of smoke but with a daily habit it IS going to add up. Don't get too hung up on the "medicinal" aspects. If you don't have one of the medical conditions that it's been demonstrated to be helpful for (cancer, HIV, etc) then you are doing it recreationally and should be pretty clear in your own mind you are doing it to get high because you want to get high. Oxy is a medicine too but if you were doing that every day and didn't have a condition that warranted it then it would be a "habit" too.
Apathy is tyranny's greatest ally.