Do something that alters your baseline consciousness long enough and it becomes your baseline. Doing anything over a long period of time with regularity will change you.
You have definitely met pot smokers who have, and do live perfectly normal lives because their baseline is better. You probably have no idea who they are.
It is also very possible for cannabis to be an improvement to the baseline. There are many, many people who could not function in society and work for their living without cannabis, be it due to MS-related spasticity, PTSD-related hypervigilance, ADHD-related need for stimulation, autoimmune-related inflammation, difficult to treat eating disorders such as anorexia and ARFID, or just plain old chronic pain — and about about it not working for pain, it does work for some, why should they be denied?
You have definitely met pot smokers who have, and do live perfectly normal lives because their baseline is better. You probably have no idea who they are.