It's a ship game.
And most of the people desire to pimp their ships to be perfect for their own scope and playstyles.
For example:
- when mining i want my ship to be perfect for mining. I can do that and have a perfect miner that is also able to survive a pve combat encounter. But under no circumstances that ship will survive a pro-gank.
- when exploring i want me ship to be perfect for exploring. I can do that and have a perfect explorer that is also able to survive or at least evade a pve combat encounter. That's not possible when we add to the equation a pvp gank
By comparison, a pvp player can pimp their ship and have it perfect at pvp - their scope and playstyle.
To conclude, a pvp player can play unhindered/unrestricted... not having to compromise anything.
PVE players cannot - they have to compromise they ships around pvp players IF they want to also enjoy an unlimited social experience in ED (which is not offered by a PG, not even Moebius / Fleetcom )
It's pretty obvious this leads to frustrated pve players.