Apple has chosen to become extremely dependent on the Chinese Communist Dictatorship while it's tough competitor has a better diversified manufacturing base not dependent on an oppressive regime's low cost labor (well they still manufacture in Vietnam but apparently not as much).
Samsung has previously manufactured in North Korea (in a special industrial area setup specifically for South Korean companies to take advantage of cheap North Korean labor). I don't know if that's currently true, or if that economic zone is still closed (from a few years ago).
So, if you're casting this in moral terms, Samsung is no angel. I'm sure North Korean workers' rights are even worse than Chinese'.
I have to say this is actually the mildest most reasonable Trump comment I can remember. He makes clear he listened respectfully to Cook but promised nothing. Sounds like a boring politician.
Yeah, pretty much my take, as well.