It use to be you needed an agent to vouch for you to an executive high up in studios. Together they would hash out if your content would be wildly received by a large enough group of people to turn a profit.
Now you have digital equity in the form of followers to show that you personally already have entertainment equity. The old guard isn’t willing to put their money fully into this new entertainment Avenue, in part because of how entrenched they are in the profits of the current machine. Studios can make money for selling a script, premiering the movie, product placement in the movie, printing the dvds, offer subscriptions to their streaming services, running advertisements on all of that as well, and distribution of the physical dvds.
But it’s changing and I would estimate it’s about 1.5 more generations away from the younger guard upending the system completely.