Actually you're right about scratched rented discs, that is annoying. But again, I've never argued you shouldn't stream or download if that's what you want to do (and have the connection to do it), it's just a shame Apple won't afford those of us who'd like to play our BDs on our macs the same attitude of enabling choice.
You see to me, the poorer quality, the tying up of my internet connection, worse value, more draconian policies on choice of playback devices, more restrictive distribution practices and smaller library of titles are areas of frustration that would fill a larger bag than the odd scratched disc (which I would naturally get a replacement for if it was a purchased movie, which tend to be what I buy on BD - I still rent DVDs and have watched a few streamed).
Let's not pretend either BD or streaming is perfect - they're not. Both have their advantages and disadvantages. And there are even good arguments for using both - as you prove having ordered your Star Wars BDs and I prove by trying out a few streamed rentals for films I wasn't too bothered about at the time. But all I've ever been saying is that Apple should give its users the choice of using both, not forcing one down our throats whether we would generally prefer Blu-ray or not.