They didn't "steal" anything. If you mean copyright infringement, say "copyright infringement". There's no scarcity involved-- nobody lost the use or ownership of any physical article-- so nothing was "stolen".
re: your business model being sustainable if the current "industry" goes away - Maybe that ship has sailed. You can't make a living being a buggy whip manufacturer or an elevator operator anymore either.
re: your business model being sustainable if the current "industry" goes away - Maybe that ship has sailed. You can't make a living being a buggy whip manufacturer or an elevator operator anymore either.