I agree that the article fails to expose the main issues properly but JavaScript in the browser, in it's current implementation is harmful. It gives you a false

I agree that the article fails to expose the main issues properly but JavaScript in the browser, in it's current implementation is harmful. It gives you a false sense of security. The biggest issue is that the crypto code can be changed at any time transparently. It's typically distributed by the same party that has your data so all you're really doing is transferring trust to them.