Why can't some songs be played with Music?

I would like to know why some songs in Apple Music can't get played in an album or in a list and can be played individually.

I will show how I see some albums:

It means Apple doesn't have the rights to stream the song to you, whether that be a locale-specific problem or because the song is Album Only on the iTunes Store.

I can confirm this "dimming out" has nothing to do with your internet, wi-fi, or cellular connection--and for what it's worth, I have seen this in iOS 8.4.1 on my phone and in iTunes 12.2.2.25 on both Mac or PC, both ethernet connected and via wi-fi.

Although I suppose it is possible, it also does not make sense that Apple would not get the rights to certain songs on certain albums; so far, the songs that I haven't been able to play seem completely random.

Finally, it doesn't seem to have anything to do with songs I own vs. songs I "borrow" from Apple Music.

Basically, it doesn't make any sense at all.