MQA is a lossy format and the quote you cite is completely deceptive:
“MQA Studio authenticates that the sound you are hearing is exactly as played in the studio when the music was completed…”
If so, why not simply present the original high-res studio file? Why encode it in MQA at all?
Oh yeah… Because MQA is cheaper for Tidal to stream, not because it is better for audiophiles.
See Qobuz