The Idea that there should be a PvP only Open and a No PvP open has been around for a long time. When it gets brought up by PvEers it gets ridiculed. That is the whole point of my post.
The suggestion you're replying to isn't quite the same suggestion, though it's also not going to happen.
"No PvP" Open is basically impossible - there's just too many ways to affect another player if you share an instance. The possibilities of ramming alone add up to a lot. You basically get "no PvP" by only instancing with people you trust not to attack you, and there's already a method or two for that.
This suggestion is to have:
1) "Solo/PG/Open" as now, PvP allowed in PG and Open as usual, but the expectation of the proponents of this idea is that most of the PvPers would move over to ...
2) An entirely separate "Open" which has a hard fork of the entire BGS and Powerplay infrastructure, entirely separate CMDR accounts, etc. PvP also allowed in this Open. Players in this mode would know for certain that no-one was playing the game in another mode where they couldn't be seen or attacked. (Though they would need a cross-platform player group still, to cover all of that)
It'll also never happen, but that's because there's no way Frontier will want the considerable expense of maintaining and supporting (and rebalancing, since player activity patterns will be very different) a second set of BGS servers, for the benefit of maybe a few thousand hardcore PvPers [1], rather than it being impossible as a matter of game design.
[1] It's worth noting that the main CQC Discord has about 2,500 people signed up to it. The GCI server has 1,800 ... the PvP League had about 500 ... the new ECCE one has got about 600 very quickly. The CQC Discord is older than the others, which explains a bit of the difference, and plenty of players of both don't use Discord at all, but broadly it's fair to say that serious main-game PvP is about as popular as CQC [2]. If they won't do the comparatively small amount of work needed to give CQCers the Taipan, they're certainly not going to spin up an entire separate copy of the game's server infrastructure for PvPers.
[2] Which, yes, makes the common PvEer complaint that PvPers didn't take up the opportunity of CQC a bit silly. Plenty of them did - just not all of them were looking for that particular style of fighting.