It has seemed to me for awhile now that selling an adventure bike without adequate tip over protection is like selling a car without bumpers. Why they don't design it with engine protection in mind is silly since most of the aftermarket bars are fugly as hell. Don't believe me? See Erics pic above.
Because buyers want things to look pretty. Bikes w/o crash protection look prettier then ones purpose built. This is why Touratech and the OEM BMW crash bars look very nice, but provide poor protection of the actual bike. the other reason is simply cost. Yes, you can easily pay $30k for a fully loaded GSA, (my wife did), and it still doesn't come with decent crash bars and skid plate. But the bean counters will trim where ever they can. Cheaper bearings the buyer can't see, no crash bars, etc. And the factory crash bars are more driven by marketing to make the bike look just so, then by engineering to actually protect the bike.
I'm personally not a guy that looks for 'pretty'. Form follows function. If it doesn't do the job it's supposed to do, I have no interest in it. But for me, the bike is a tool, not a toy, so that perspective drives my beliefs/opinions,
and purchases.
The only parts littering the roadways in Europe are left over MG parts from the '70s.
And most of those have been recycled by now.