With a title of "Why I quit medicine" you would think somebody quit medicine because there is something wrong with medicine or the job of being a doctor.
What we have instead is a very well intentioned individual that is getting out of medicine because they want to run a startup. And that's fine. Maybe getting jealous because they see it as a path to riches and have been reading about to many outliers. Or maybe wanting to change the world.
But the job that he does is known as a "hospitalist" in this country. (Essentially Internal Medicine but not office practice).
http://www.hospitalmedicine.org/
My wife is one, and practices in a very modern hospital system. I've asked her many times about "the handoff (signout)" from the first time we were dating. Because it seemed outdated to me that when we were at dinner (and she was on call) she had to scribble down notes about sometimes 20 patients over the phone). But apparently the verbal interaction is important as well between two doctors and can't easily be summarized in writing. And I've overheard plenty of handoffs and can attest to the interactions between doctors and the nuance that can't be expressed in writing. (I even said why can't the other doctor just record something that you can listen to and a million other ideas and she shot all of them down very easily as not being practical. And she had every reason to support an idea like that if she thought it would make me money..)
Getting things done is difficult, and yes, they are very closed minded and it's hard to get change.
But drawing a comparison with "Considering I can talk to my smartphone and tell it to send a message to my dad or remind me to water the plants when I get home" doesn't take into account that whatever system is setup and accessed needs to be rock solid, dependable and can't fail in many degrees above your typical startup offering.
So this is a great ambitious idea that he has undertaken and I wish him well. But my guess is that he will have to partner with a health system in order to get adoption of this idea and work out the kinks and prove the concept.