If a listener desires influence from a preamp on the source material (the music as it was mastered), it should be proportionate to influence the kit downstream of it offers. I assume this is the “synergy” perpetually discussed - small to moderate influences of different artifacts in the playback chain syncing up to the preference of one or more listeners. Believable even if not particularly demonstrable. 😉
e.g.: If you want clear-of-artifacts like a Benchmark (preamp) but then run your ZZ Top tracks through a power amp with Shuguang tubes*, you probably keep people guessing in all other life matters, too! 😆
*that’s no dig at Shuguang tubes - in the right rig they’re great fun