Folks still trotting out the "go Solo" trope are missing the point, or at least one point.
If I wanted to I could log into Solo right now, fly to within a few hundred light-seconds of Abraham Lincoln or Mars High, and start interdicting NPC trade ships and arbitrarily destroying them. I could do this for as long as I wanted with only bounty warnings and the very occasional, basically random, arrival of a couple of security ships to suggest I was doing anything untoward. As long as I didn't mind suffering a reputation loss with Mother Gaia or the other Federal factions, and I jumped over to another system to pay off my bounty occasionally, I could essentially do this forever.
This has nothing to do with PvE versus PvP, or Solo versus Open.
I should simply not be able to do that in the heart of the Federation. Ever. In any mode.
If FD get their act together with regards to criminality and law enforcement then I should be prevented from engaging in such activity, or at least from engaging in it for very long. That a decent law enforcement system might also dissuade others from random hollow-on-hollow attacks in Zaonce or Lave, and push criminality into the more lawless systems as Braben originally planned, is a bonus. But it's certainly not the sole aim, at least as far as I'm concerned.
Yes, I can go into Solo mode. That will let me avoid PvP if that's what I want. But what it won't do is change the fact that the criminality and enforcement systems in the current build of this game are an absolute joke and an insult to its legacy. The NPC police in Frontier may have been the space equivalent of the Keystone Kops, swarming out of the station in endless numbers and quite often ramming into each other in the process, but at least they eventually got the job done and either destroyed or chased away the criminal player. The ones in ED can't even do that, which means something's gone very very wrong.
Note, just in case anyone gets the wrong idea, that previous sentence is not meant as a dig at SJA's improved AIs which are getting better all the time. It's simply that so few of them, if any, spawn where and when they're needed. That's not an AI problem, it's a fundamental problem with the game's rules.