Digital copies are always a license to access the content. That’s it. You don’t own a digital copy. Ever.
The studios can replace the digital copy with an updated version, a censored version, or even revoke the license altogether at any time, without refunding you a dime, and they’re well within their legal rights to do all of those things.
Is it right? Nope. But that’s how it is.
Until dual power structures are erected, anyway.
Yes, in which case we won’t have to worry about these things because there will be no more big budget blockbusters.