It's not the companies, it's the internet itself. The internet is only composed of communication protocols, with security as an after-thought. The solution to this is incorporating security at the protocol layer, which is the end game of crypto platforms like Ethereum.
I am not convinced by this narrative. I would rather assume that like any ordinary project, Quora also was developed with zero security in mind. I would bet in a huge amount that noone has ever said during any project meeting that `BTW. I think we should spend 2 more months implementing every detail securely`. Probably security was an afterthought.
