Thank you for sharing your personal experience!
That's very interesting that you perceive it differently. I don't have any personal experience with this, so I can't confirm or deny the effects of the Rat Park experiment, I just read about it and thought it was very interesting to share.
And you are right, of course there's much more to recovery than just a happy environment - but maybe it takes you one step closer than being lonely and depressed. In the end, it all depends on the person and maybe it can't be generalized that much.