Without getting into an argument about whether software can make a difference, and if so which ones actually do sound best...
I will say that I've noticed a lot of people have similar experiences, where they claim to love Roon (or some other graphically-rich, versatile software) but find that they prefer the sound out of some other more simplistic option. Even to the point of wishing Roon/etc sounded better due to the superior appearance or usability or whatever. I know several people who use Roon for general listening but then break out their other less polished software for critical listening and evaluation.
My takeaway is that for a lot of people, more hassle tends to equate to better sound. Thus vinyl "sounding" best, then actual CDs, then file-based streaming, then Tidal/Qobuz. This is probably on a subconscious level, but for a lot of people a more direct, "pure" playback approach will win out over a big complex software experience like Roon. Just like vinyl, the whole affair becomes a ritual and that somehow makes people feel more intimately connected to the music in the end.
Again, this is just an observation, and it applies pretty universally to a variety of things in the audio world. And again, not saying there aren't cases where the software doesn't produce actual superior sound one way or the other. But the human brain is complex and weird, so I wouldn't be surprised if at least some of this wasn't caused by placebo/confirmation bias/whatever other weird process is happening upstairs.
In the end, use what you feel sounds most enjoyable to you, regardless of the cause.