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.