You point out that you don’t leave your property when stoned. I presume that means you stay home because you somehow feel impaired.
Are your children home with you when you are impaired like this (everyday)? If yes, then you’re not trying hard enough to be a good parent.
He’s just rationalizing his addiction. It’s a sad thing to see and I hope he can get into long term rehab or something.
He’s also pretty stupid, if what he’s saying is true, CPS could and should find him and help the kids.