Or they dont want to spend money on something that costs them money.
I see you're having difficultly understanding that Sony, as a company which was on the verge of brankruptcy, might want to try making profits and establish themselves in digital markets....but that is where the general market is going.
BC makes more sense also for MS, who is getting ready to compete with valve with their windows 10 marketplace. They actually have a strategy for having a "single unified ecosystem" not unlike steam.
BC is simply your preference. Like the guy in the OP said, it's just a different path. So you should buy an x1 then over a ps4, because your preference is to play x1 and 360 games.
It's just facts that you have to look at. Cold hard facts.
You can have a ps4 or an x1 with BC. That is all. Nowhere in this should there be any association with "trying to fuck the consumer". It is what it is, and emotional attachment of presumption or assumption is a result of bias, whether that be preferential bias or what have you.