For passive instruments it matters a lot, as adjusting volume also adjusts EQ. For active, not so much.
All my traditional electric bass guitars are passive at the moment. I tune my basses for the room/stage with the pickup blend and then leave it once it’s dialed in, to be nice to the sound guy, and band mates for that matter. With 2 pickups, I start with both dimed and will roll one off to help fit the bass to the room if needed. On a p bass style, volume and tone are always cranked all the way. Passive volume knobs roll off highs as you attenuate volume, and that’s rarely a good thing for a passive bass in a band with rock drums, distorted guitars or horns. You’re asking for mud if you don’t have any bite to your tone, and good stage tone is often a lot crispier than good solo/practice tone.
My eub and abg are both active, with very strong preamps, so volume is much less a part of dialing in EQ. That’s not a hard and fast rule, some active magnetic pickup systems still have some EQ reactivity with rolling pickup volume off, but my current active basses are all piezo systems. Again, once i find my settings i try to keep them where they are, but the gigs where I use those instruments are often a lot more intimate, often don’t have a PA, and are conducive to me adjusting my own volume as needed. In general I will try to leave a little headroom, in case I need that extra little push over the cliff. My main acoustic electric Guitar has such a loud preamp my usual starting setting is around half volume. I still try to set it and forget it, but that is more of a necessity with passive instruments. There’s much more fluidity with active instrument settings, which isn’t necessarily a good thing, as sometimes I end up fiddling with tone settings all night in tough rooms.