It isn’t about making movies, the problem is distribution. And the streaming payout for independent producers will never make back their production expenses.
They may have to tweak the monetization angle a little bit, but I think good quality 90-minute productions would be achievable for relatively small expense and that reaching a decent profit margin would be quite do-able.
It's like building a better mousetrap. Making a Hollywood movie for $200M isn't a good mousetrap anymore. A nerd in his basement making a major movie in his spare time is a better mousetrap.