Another line that should be drawn, by the way, is the differentiating one between competitiveness in the open world and griefing practices. Competing for prey has, in my experience and that of many others, increased the excitement of the open-world environment, whereas deviousness of purpose, and the intent of reducing the effort you and your linkshell invest, at the expense of my work and the effort of my linkshell, are a completely different category of things.
I'll concede that difference.

If there is more depth to the pursuit than simply being the first one mashing a button on when the monster appears right in front of your face I might actually want to be involved in it.

Though the concept of being pulled into an instance once getting claim might still exist. Honestly that seems to be what's happening with the Primals you can tame. I'm kinda ok with that because Primals are a unique experience that I would prefer to remain instance-styled. Ifrit can't really threaten you with it's charge ability if you can just move out of it's effective ring of range.

And imagine the collateral damage if Garuda was fought by a nearby lowbie camp?

... wait...

Ok. Yeah. I'd want to see that carnage. I hope they at least get to see a bit of it in Frontlines.

Still, I don't begrudge the decision made to keep the Primal fights more arena based.