Absolutely my opinion, what you may not realise about film festivals is that lots of the films are self submitted, i.e. the producers submit their own work and the festivals want to fill screen time outside of the one or two featured films that they have brought in with maybe a retrospective of a famous artists work thrown in for good measure. Go to some festivals, you'll see some of the crap on offer. Anyway, lets agree to disagree, films made on phones aren't going to majorly disrupt the film business with the exception of a few that will hit the sweet spot with an amazing script, skilled technicians who understand the constraints of shooting on a phone.
Unsane - one of the Soderbergh films in the article you posted had over a 100 crew members, Olive - 50 ish crew members plus many more not on the IMDB page for the movie, this is not some guy or girl working out of their parents back bedroom with nothing but an iphone and some bright ideas.
I have faith that humanity will not hand over the joy of art and the human condition to the machines, we may do for the lowest common denominator stuff but that about it.