To say there's zero argument it's good for you is a false statement, like anything everything we ingest or inject in the pursuit of "better" there are pros and cons to everything, from Testosterone to weed, to buprofen etc. For me, it's the following benefits that has me a cannabis user
Pain relief, specifically joint pain - helps in the gym
Better sleep - helps in the gym
Mood elevation/anti anxiety/ depression relief
The ingestion of cannabis to aid these ailments make a hell of a lot more sense than taking three different drug compounds from big pharma that also come with their own host of potential sides/dependency factors. I'm in my 40's and didn't start regular cannabis use until really the last 5-6 years, it's not about getting "high" for me or many other users, but once in awhile is that a fun benefit while watching some netflix, sure.
As far as the whole THC/CBD they are the natural compounds found in cannabis and with regulation consumers are able to make educated choices on finding the right ratio to achieve the results they are looking for. The CBD dropper I use in the morning for joint pain and mood elevation has a much lower THC content than the vape I hit before going to sleep. In terms of studies, googles your friend if you care, I've spent enough time on what was really meant to be an innocent joke about the hunger from MK677 and munchies from weed being a bad combo for the waistline.
peace
trj