I agree that differences in effect, especially in most of what’s out there, are often largely overstated or just plain made up for marketing or other purposes,
But I also think you are being quite reductive there Vern.
That being said everybody is balanced a bit differently so for you that could very well be the whole truth.
For that statement to be true though, it would mean all cannabinoids feel the same. That smoking a THC dominant plant feels the same as a CBD dominant plant feels the same as a 1:1 THC:CBD plant, etc.
Not claiming to know what you feel, because again, everyone is wired or balanced a little differently.
If you had a group of people eat nothing but McDonalds burgers and fires for a month, and then had that same group of people then next month eat nothing but pasture raised beef tartare, sourdough bread, a salad of tomato, onion, lettuce, cucumber and potatoes cooked in olive oil. Some of those people would say that they felt the same throughout. That doesn’t mean that those things aren’t different and don’t have different effects on your body. It likely means they just aren’t paying close enough attention to how their body feels.