I agree. I consider myself to have a high tolerance and high doses of THC alone don't get me "high". It's a dead from the neck in both directions feeling. THC just plays one note. You need the whole keyboard to play nice music. Humans are smart but we do not know better than Mother Nature. Is it just that THC was the first cannabinoid discovered so everyone is fixated on that?
I don’t think it’s because it was the first discovered, but because it’s the one that’s responsible for most of the effect of cannabis.
The best analogy I can think of is to think of it like a car engine. Sure thc is the large powerful engine block that makes it go, but to make it truly fantastic you need the right carb and exhaust and maybe even a turbo or super charger. All those little thing are like the other cannabinoids and terpenes in that they take the base thing and make it even better.