Nobody cares what you want, especially Apple. They care what most people want. Clearly your needs and requirements are so far away from the mainstream (ie. you enjoy swapping out computer parts) and to expect Apple to cater their products to you, when you don't represent the average consumer, is pretty ridiculous. I don't think Apple will miss you- they gain another 100 customers for every person like you that leaves. And it's not $69 for a USB stick- if you haven't noticed, it's for a brand new OS, + a USB stick. Apple has seen its insane success primarily through what you call 'dumbing down', or streamlining their products.
Forgetting OS installing media from computer package you are selling is not "streamlining".
Owning installation media isn't complicatied to anyone.
Geeks know to what to do (copy a partition image, burn disk, buy usb stick), but "the rest of us" does not.
Especially when Apple does not advice to do so in "Getting Started".
So for the rest of us, not having OS installation media will make things more complicated.
Apple has done a lot of this kind of "streamlining" in recent history and it will backfire at some point in the future. They just doesn't seem to care about it now, when they are making record breaking profits.
Selling Air without OS install media is not a problem, because it has internet recovery.
Selling a MBP, which does not have internet recovery and DOES have optical drive, forgetting OS install media is same kind of failure that most of cheapo windows laptop manufacturers do. They are just hoping that you buy a whole new computer when hdd brakes down after warranty has expired.
This is not economical or ecological.
But what do you care?
Maybe you have enough money to buy new computers all the time and don't mind about enviroment.
Do you really think that those 100 customers Apple gains would turn away, if they find that there are some optical disks in their box?
Only reason for this madness I can come about, is that Apple wants to alienate its customers for having a hard copy of the content/software it "owns". (Personally I have hard time understanding why a copy on a hard drive is not "physical"? Aren't hdd's physical?)
This way they can have more control over their customers' content, sell more iTunes movies over BD, cancel the customers ability to use software by any means in the licence, and afterall, invent some new copy protection control to content/software they sell.
Maybe you can't burn/copy OS X 10.8 installation image anymore!
Long live the walled garden!