That being said, here's my devils advocate for your 3 complaints:
1.) Yes, you can make your servers redundant, and keep them up 24/7, or you can use the pay as you go model with the Blockchain. The difference is like keeping a car idling vs. using an electric car.
2.) Writing things to the Blockchain can be very beneficial compared to your own database. Ownership of offline things like bikes can be done with a Bluetooth/NFC chip and a bitcoin address. Also for online transactions, it provides a tamper-free source of truth.
3.) You argue that someone would still have to write the logic for the Blockchain apps. That's definitely true but the impact of a Blockchain startup might replace a higher ratio of jobs than you expect. (Like Kodak vs. Instagram numbers)
Give it time, it's still early to call it a bust just yet.