The researcher observing the lion didn't create the concept of suffering tho

I love what-if scenarios :)

I think you could go one step further with this theory and say that humans are not that important at all. I mean, why would we think we are? Because god told us so? Maybe he just said that to account for some variable and left it at that. Hasn't looked back at what we were up to since.
In some distant corner of the universe is a much nicer planet where everyone is living in harmony and peace. We're just the control group :)