I disagree with this. It's clear in cases such as Facebook that data privacy is abused. Not only that, but users don't have much of an idea of exactly how their data is being used. In a P2P system powered by blockchain, I can set permissions for certain data my on-chain information to be accessible between different parties, whether that's a doctor or a friend on a social media platform. They can receive a hash an decode it locally to view whatever information I am granting them permission to view.
> Myth #2 Blockchain can revolutionize supply chain. Its a datastore with some cryptographic identity checks and tamper proof guarantees. It can't prove that a package made it from A to B or that it stayed at some ambient temperature IRL. It only records that someone attested to that, not whether its true. An ordinary database will do for an audit trail.
Again, I disagree. Custom devices are being designed to record information in a tamper-proof way and submit to chain.
> Myth #3 It cuts out the Middleman. You dont need blockchain to cut the middleman out of indusrty X. Any service trying to do this wants to be the new middleman with lower service fees cos' blockchain!
I disagree with this as well, in certain context. Yes, many of the newer projects are trying to run blockchains they're developing as businesses. In that sense I would agree. Where I disagree is where blockchains aren't services, but protocols. A marketplace protocol can cut out Ebay, a stack of supply chain protocols can cut out SAP, loaning protocols can cut out current loan services, etc.
For somebody calling themselves a 'blockchain engineer', it sounds like you don't have a great grasp on what the technology enables. Is this all doable today? No, but some of it is. We're still in the early stages where infrastructure and tools are being built out.