I don't think there's much doubt that BGS and PowerPlay are fundamentally PvP activities; you're objectively competing against the efforts of other players for the benefit of your own powers or factions.
From there, there's a certain elegance to the idea that a PvP activity at its core should be built with the possibility of direct interaction.
It's certainly not a far-fetched one; Powerplay arguably mirrors territorial PvP modes from other MMOs, and the idea of open-only PowerPlay was discussed extensively a couple years back.
I think we're also too keen on lumping PvP enthusiasts in with Deciat gankers, since it makes for an easy strawman. That's hardly representative of what our community is or wants; StellarKnight is about as far from a career ganker as you could imagine.
Instead, the threat of being attacked in Powerplay (and, by extension, BGS) turns a numbing grind exciting. Far from leaving good players to the wolves, we send defensive wings to ward off gankers; in the end, everyone gets their share of content, and there's so much positive interaction in the process, both within and across communities.
It's a genuinely exciting way to play, and I encourage you to give it a try before disparaging PvP as a whole!