You are 100% correct, but you have to pick your poison. Would you rather have a great player with a $h1t GUI or a world-beating GUI with mediocre sound? Many people on Head-fi have a lifetime Roon subscription. So it only makes sense for those people to do whatever they can to maximize Roon's sound quality and therefore their investment.
The cold truth is that many players can beat Roon in raw SQ. But none I'm aware of can match Roon's UI and recommendation algorithms (incidentally, Qobuz has recently become miles better at this). This single feature is so integral to my personal music discovery that it would be difficult to live without it. But that's me, and I'm not you.
Unfortunately, it seems you can have a great GUI or great sound - not both. Not yet anyway...