No way.
a LOT of people play in Solo and Private groups, removing NPC's would make the game even more static and lifeless than it already is!
What nonesense to even suggest such a thing!
+1
I play in Solo and "solo" is still online and in the same world as everyone else, so if they take out NPC's the world will feel lifeless.
What OP is asking is not fault of the amount of NPC's in the game. In a massive open world even if you make all players play in the same instance (imagine 5000 players at once), you won't be able to see them all unless you all join and play in the same couple of systems and at the same time. And then what? What happens in the rest of the world? How transit will be in those stations? Are players going to actual role play and take care of the galaxy?
Just by having in mind how spread we are in the galaxy doing our own thing all around, it makes no sense to reduce the amount of NPC's at all because if you do that most of the systems where a few players play (and solo players included) will feel empty. Imagine less transit/traffic in stations/outposts/supercruise, etc...no please no. I don't want to see a lifeless empty world. NPC's should stay.
Also some players don't role play at all, they just want to make your day a nightmare because they are bored...even if you don't want a fight you will still have to deal with undesired interdictions and whatever crap they want to do with you (like crashing on you for no reason and stuff like that, for the "lols"). Basically a game for you tubers...
Imagine if you take out NPC's completely from the game and make the whole galaxy filled with human players only. I can see how the galaxy would loose "order" and will become a complete mess in less than a week. Not even talking about how the economy will turn out, since the amount of players will not be enough to fill every system, it will generate a major disparity between factions and such. A complete mess of a game basically. You can't let players have total freedom in a game, there should always be some rules.
Give time and see how those other upcoming space games are going to deal with this since they are even more player focused...I play games for a long time and multiplayer games as well...one thing that I learnt is that you can't trust in random players at all. Unless you want to play "Elite Dangerous: Survival Edition". No, thank you very much.