Can you verify your 99% stat? I'd accept that a lot of them are either trying it for the first time or seasoned players that know what to expect and enjoy the extra challenge a player blockade provides.
People try things, some find they like it & do more, and some (you argue many) discover that they don't.
I used to, I did quite a few CGs including the battle of Lugh, the original Hutton run, the Sothis Gold run & many others. The Hutton run was my first really fun & memorable CG, going up against the Code after an hour and a half of flight, that was IIRC the only time I ever double-tapped my J key. The Sothis Gold run was initially just a bit of a laugh for me, I spent a couple of evenings distracting the Code in an unarmed Cobra, carrying 16 tonnes at a time. They chose to blockade with Cobras which made the thrill of the chase fun for a wider range of skillsets. In the end though I wanted the CG to succeed (it was the first really distant CG IIRC and takeup was very low) so me and maybe a dozen other Cmdrs loaded up trade condas with gold in the bubble & shipped it out there to get it past level 1.
Eventually I got bored of it & did other things. I occasionally still do trade CGs in my Cobra, but it's no longer the fastest thing around and the weapon disparity has increased considerably - to be fair the blockaders are better organised and more familiar with likely tactics, they are too good so my survival chances, flying the way I like to fly, are lower. I mean no disrespect to the Code, they were the true pioneers and helped to establish the rules of engagement now commonly seen.
Imagine that Hutton run CG in Solo. It would be dull as hell, why would anyone do that? It was Open or nothing. I tried a run in Mobius and helped unload a Conda, it was worthy and I felt like part of a team, but it was more of a chore than actual fun.
The reward for playing in open is (or has the potential to be) the unpredictable encounters with other players. Constant harassment and people wanting to fight isn't unpredictable, it's the worst kind of predictability. But some love it and fair play to them, if I want to join in I know where to find that kind of play.
Its pointless man, you arguing with people who dont understand the game, that hardly go to open (if ever), dont do PvP, dont understand how to build a ship for survival or attack and are interested in this game being a mandane expirience with no challenges and PvP used for mining salt.
Any dimwit with 0 IQ points can see the unbalance with the modes, they know it, they argue for the sake of the argument. They are SOLO players who will have no effect on them if OPEN will have an incentive. They are scared of being left behind and their safespot bubble Mobius will become an empty space.
It is called hypocricy.
Sure, when you value expirience of the game more than credits, you go open. I do not argue with that. But cases of people actually choosing that is about 1%. Sure, some can tear shirts on their chest to show "open only or no balls" tatoo there, but they are hypocrites as well. Human choses efficiency over expirience in most cases. Take voleyboom or any other exploit, for instance. And analyse causes of outrage.