Yes a very valid point that describes delayed gratitude.
Sadly to some people the effort to look for and find a disc on their shelf is too much effort. That is even before you think about puting the disc in the player.
It is the same as back in laserdisc days, oh....getting up to flip a laserdisc or wait for the player to change sides for many is too much time and effort so I'll put up with grain ridden vhs instead.
Or if every delivery company was as reliable as Amazon's own drivers, and did not take a week to cover the final mile when there is not any bad weather, for example Evri then we might not have this situation.
A lot of the problem is 'the good enough' brigade that infects many things.
The part about a pyhsical copy being the only safe option for owning a movie is bang on the money. Without checkinging, I believe that George Orwell' 1984 Kindle edition was the victim of a rights dispute leading to the title disapearing from customers' collections. They paid to own that title. Ironic.
A physical disc can also be sold on or exchanged, or if parents require reliably kept away from an unsuitable minor