In the DVD era most people didn't buy expensive DVDs - they rented them from Blockbuster (then later Netflix) just as they had done before on VHS.
In the post-DVD era there is still plenty of money coming after the theatrical release in the form of money from streaming services. How does this source of revenue compare to that of the DVD era, and, if it's significantly different, then why?
One thing that's different nowadays is how quickly movies go from theatre to streaming, but that's under control of the movie studio - presumably they expect to make more money this way.
Perhaps the real problem is the cost of producing, and marketing, these Hollywood movies in the first place, making it necessary for everything to be a mega-hit to be successful.