You’ve put forth the only argument that wins. It for this reason that we still build passives as many in the hi fi hobby love the ability to "craft their own" so to speak. The technical virtues of "the lowest distortion way" dont always win as we can easily see with those that love tubes.
My experience is that when active is chosen, it does not diminsh this "craft your own" part of the hobby and actually strengthens it. Once the distortion of so much wire is removed, and phase is now linear, the items IN FRONT of the actives take on new meaning and greater dimensionality. Cables, turntables, line level cables, streamers all become more different, more obvious than before. I ahve found that changes in front of the actives are now even more significant than before.
All that being said what most people focus on is tone, how a trumpet sounds, a piano, a vocal; in this the active and passive are remarkably similar. the times I have done this comparison, many in the room cannot tell the difference or just take a wild guess. What does affect choice that is easy to miss is tiny differences in level, comparing two things; this can make a dramatic impact in perception of which one sounds more full or warmer. Slight differences in level appear as better bass or less bass, more treble or less (thank you Fletcher Munson curve).
The source material can also influence this choice as many records or albums have more or less bass or more or less treble than another record. IF I play Led Zeppelin you’ll be convinced there is less bass (these LZ records are notorius for no bass). If I play Patricia Barber you will be convinced there is more bass and better midrange (I know the engineer who records her and he uses very expensive hand made tube microphones i sold him many years ago that have tremendouos definition) .
The casual or rough demos we expereince in trade shows or at someones’s house can really lead you astray, as many factors influencing perception are hidden: look no further than continuously variable gain controls on preamps which are impossible to match or repeat from one source to the other. A tiny 1 dB level difference will make you 100% certain one of the two things has more bass or treble. Often we attribute differences that we hear to something other than level as level alone is tough to hear.
For example, conviction that the 800W amp vs the 300W amp is signitificant enough to hear the differences in dynamic range may not be true depending on just two factors: the efficiency of the speaker you are comparing them on and the "sound" of the amp itself on that particular pair of loudspeakers. I think those two factors could sway your choice one way or the other, regardless of which one has the larger power output. SO if you are actually listening at 85dB SPL on a 90ddB 1w/1m speaker, it may not show that a 800W amp as better than a 300W amp dynamically. O a 80dB 1w/1m speaker, it may show this easily.
Brad