The answer to that is in the article. The information is accessible. It is possible to become a programmer without any formal certification, all the information is out there.
AFAIK all the jobs you mentioned need a formal certification. You can't become a doctor without going to med school. You can't become a lawyer without passing the bar.
Even if you don't (not sure about a car mechanic, depending on the country), it's a lot a harder to get your hands on a car to tinker with than it is to download some framework and watch a get started video.
That's what the author said with programming is accessible. It is very easy to get started which is often misrepresented as "it's easy".
No one would say "becoming a doctor is easy" because you're never gonna be a doctor from online documentation and YouTube videos so there is no incentive to frame it that way.
AFAIK all the jobs you mentioned need a formal certification. You can't become a doctor without going to med school. You can't become a lawyer without passing the bar.
Even if you don't (not sure about a car mechanic, depending on the country), it's a lot a harder to get your hands on a car to tinker with than it is to download some framework and watch a get started video.
That's what the author said with programming is accessible. It is very easy to get started which is often misrepresented as "it's easy".
No one would say "becoming a doctor is easy" because you're never gonna be a doctor from online documentation and YouTube videos so there is no incentive to frame it that way.