Non-competitive markets for critical infrastructure are absolutely something governments should be concerned with. The US government wants to abdicate its responsibility (like it has been doing since at least the 90's with the Microsoft case) that's for you Americans to worry about. The rest of the world has its own citizens to worry about.
Yeab but buddy, why is that supposed to be Apple's problem? Or Google's? Or Microsoft's? Why don't governments enter the market with their junk for critical infrastructure? Because it's cheaper to force someone else into it?