What do I know about finger playing, I eat with knife and fork too!
Seriously, finger playing muting is to me sonically a different kettle of fish to palm muting at the bridge and then hammering eights in down strokes with a pick, Alan Lancaster or Ian Hill style. Sure Geddy muted
adjacent strings (who doesn't after a while of playing, it comes naturally), but I never identified his 70ies sound with him
muting the notes he actually played. Other than by the mere fact that as a finger player you automatically mute everything a little as you touch it. Which is why I play with a pick, because I crave for that initial crispness even if my sound is nowadays much darker and warmer than it used to be.
I mute constantly with my left (fretting) hand as well. I don't hold the fretted note down forever, but slightly let go of it in short intervals, that adds a percussive note and makes everything sound more dominant. You know how we Krauts are ... world domination ... we just can't let go of it.