The video is arguing: why should a doorbell have the ability to set your house on fire? (Metaphorically).
Heartbleed was an issue of exactly this
"The Heartbleed bug allows anyone on the Internet to read the memory of the systems protected by the vulnerable versions of the OpenSSL software"
Architecturally, this should never have been possible.
http://www.pl-enthusiast.net/2014/07/01/how-did-heartbleed-r...
Obviously attackers are going to look for the weakest point, but your agument sounds like "social engineering should happen, so don't bother locking your doors at all".
The only thing I was criticizing was you seem to think it's easy to simply create a secure system. It's not. That's why there are tons of smart people in security but hacks still happen.
This is a super naive view of the world.
Nowadays most hacking incidents are based on social engineering, meaning it's not the technology that's weak, it's humans who are the least secure. Yes that includes you and me.
So NO, your solution won't fix anything. Believing that a technical solution can fix everything is the most dangerous thing because in reality it will never be safe but you just have a false sense of safety, which is how most hacks happen--most hacks are carried out by taking advantage of this mentality that everything is safe enough, which in reality isn't.
You will probably believe that the system you designed is super safe because it only lets people do what they said they wanted to do, but as I said, most hacking incidents are social engineering, so someone will definitely take advantage of this and attack you where you least expect it.