Is this supposed to be an article? Or just a stream of consciousness thing? He doesn't really even articulate his argument very well. His comment about budgeting below WGA minimums suggests he's on the writing side of things, but his writing (in this case at least) wouldn't suggest he was a "professional" writer.
The only way to get rid of these amateurs is to close them down - get them off the streets - and make it possible for them to be real filmmakers by employing them as interns and training them.
The problem is being employed and trained in the industry doesn't make one a "real filmmaker" any more than getting a job as a mechanic makes one a "real race car driver". There are thousands of professionals in the industry who are very good at their particular specialty, but aren't in any way 'filmmakers'.
We inherited the terms Amateur and Professional from the theater. Amateur meant unpaid. Professional meant paid. But Amateur also means uneducated, untrained and ignorant in the area of filmmaking.
That's the issue right there - he's basically defined amateur as "uneducated, untrained and ignorant", and then based the rest of his argument on that. The problem is amateur can cover a wide range of experience, training, skills and interest, but he's not interested in acknowledging that because it makes it difficult to generalize the way he is.
Personally I'm striving to be an amateur filmmaker - I realized long ago that doing it professionally held little long-term interest for me. But despite my amateur status, I'd consider myself well educated, trained, and knowledgeable in filmmaking - exactly the opposite of how he defines amateur.
The truth is when I started this 20 years ago it wasn't really possible to do much as an amateur, at least not on a high level, because the resources - for both learning, and actual production - were simply out of reach financially unless you were independently wealthy. The only practical way for people to get experience and access was to get a job in the industry. Times have changed though, and now it comes down as much to your willingness to learn and practice the craft as anything else. If your goal is to make a career out of it then you'll certainly still probably be best served by getting a job in the industry, but it's no longer the only practical route to becoming a filmmaker.