Nothing is won that can't subsequently lost - there are no permanent "win" conditions.
You can go up and down, lose territory and bonuses. There is no 'permanent' win state in any ED features, its not that sort of game. Even Titans can respawn, and only via narrative is anything truly 'the end' of things.
.. because players that might not be fun to play among are optional, whereas playing in a PG with friends is specifically facilitated by the game
But again, you deliberately pick ahead of time who you play with- not unless you are someone who sees another player and reaches for block before doing anything else?
Also, don't you see the logical problem in a competitive feature that
should equalize the advantage but instead distorts it?
Which holds for Open as well - as system volumes are enormous and players dropped in to a normal space instance are invisible to those in SuperCruise - best to remove the likely exploit of players colluding to gain rewards for contest unconstested before it becomes a problem that is not limited to one game mode.
AFK was used for farming in PG the same (I assume if destruction = -ve INF, it might not) but its deliberate and unstoppable because any and all eyes are not hostile. In Open you'd be able to see traversal (since you don't exit rebuy in the middle of space). I'd point out this is how other issues like bots were found- people actually
saw it.
If FD link player value (i.e. how far up the pecking order they are that week) to the inf gain or loss (if its a thing) you'd stop the potential exploit. But then thats just one apect between modes- reducing wing bonuses in PG would have done the same (and why I think its a good idea).