>Again, solutions to these (ie. Venmo, Square Cash, Facebook Cash for p2p) do not require blockchain. How does blockchain tech help in these use cases?

Bitcoin is the only decentralized one. I don't think it means everyone needs to use it, but I think the role it fills is a very important one.

I feel like this criticism is like criticizing torrents or personal NAS media devices when fileplanet.com and dropbox already exist, or criticizing email when Facebook Messenger exists.