Opposing any individual player in a game for acting in their own rational best interest is dumb. If a big company with good products didn't act defensively in these situations, they'd be eaten alive by patent trolls who have no such qualms. Until the laws are changed, these kinds of patents are a necessary evil.
Because Apple never capriciously brings down the hammer on the small guy.
Still, I'm more saddened by the fact that if Apple didn't do this, patent trolls probably would, so taking a stance here is a matter of picking a lesser evil.
In general, it's just a patent cold-war style arms race between large companies - they all keep huge patent portfolios so they all don't bother suing each other for patent infringement, because they're pretty much guaranteed to be infringing on a bunch of each other's patents - it creates a legal situation that neither party wants to get involved with in the first place.