The data to validate this is scarce, but I'd wager that most rips come from stolen physical media. I don't think there's too many people out there going "I just paid $20 of my hard-earned money for this Blu-ray, so now I'm going to give it away to strangers for free". The whole "paying for something" thing is kinda antithetical to piracy in the first place. But again, there's no real way to quantify this.
So, according to you, piracy is stealing, because it has to be stolen at some point. And the reason that it must be stolen is because it is connected to piracy.
Don't act surprised if you're downvoted, if you present your circular logic this plainly.