Right, nobody wants to have their music library relegated to a 3rd party app like a 2nd class citizen and lose out on all the integrations that come with having your files a part of the device’s native music library. Apple will let you import AAC, ALAC, MP3, WAV, maybe even WMA?? Which is relevant on what planet? But FLAC is always excluded and nobody seems to have any excuse or explanation.
I realize this has become a niche issue that less and less people will care about nowadays that streaming is the primary means of listening for so many people, but this is something that should have been resolved long before that transition happened. They’ve neglected the local-music user experience for those who care, for far too long.