Maybe if you actually used it you'd see the benefits of it... try transferring any amount of value with Bitcoin.. take note of how much it costs and how long it takes. Then do the same with Ethereum. You'll start to learn pretty quickly what some of the main differences are.

Regarding the 'fixed amount of Bitcoins' argument, I'd agree it's a nice simple marketing message but if you look in to what Ethereum is planning to do, issuance could well go to close to zero, zero or even below zero once proof of stake is introduced: https://twitter.com/VitalikButerin/status/879858608091144193