I understand and agree to an extent, but that really doesn't excuse the rarity of Microsoft's sales, nor does it excuse the low discounts. While stores COULD pull games from the shelves, I don't think that would happen unless the One's sales went 75% digital or something. They make a meaningful amount of money on the quantity of sales, I imagine. I wouldn't consider myself a typical consumer, but I would say that pulling games from the store would be more-likely to convince me to boycott the store for all purchases, not Microsoft.
If they just consistently had games at prices competitive with the physical competition, I would be OK with it. However, they're usually $10-15 more than the physical stuff, which is crazy. I mean, why would I go spend $60 on the digital download of NBA 2K14 when I could go to Best Buy, price match to Amazon's $40, then not have to wait for the hours of downloading to play it? I could also go the route of third-party seller on Amazon, get the game for $29, then wait 5-7 days for delivery, because half the price is worth the wait, IMO.