Disney+ has said that by sometime around the mid-2020’s they expect their spending on content to be $10B. If they are spending that much on content (and also btw aren’t paying to license anything like Netflix, either), then I actually think streaming services are the natural new home for blockbusters. And the company will make more money.
John Campea ran a rough expenditure tally if Disney+ reaches Netflix level spending, subscribers, etc. except they’ll never have to spend the outrageous amount Netflix does on third party content and they probably won’t be producing as much “stuff”. Disney would use their budget to focus on high profile series and movies, and even if they stayed at their current $7 price (they won’t), they would be an incredibly profitable business, generating ~$7 BILLION per year (again, once they reach Netflix levels).
A $200M film will flop on PVOD, but it will do great on streaming. The movies would just be made for a different purpose now, which is subscribers.