Quote- you'd definitely want to raid (hostile) groups that are a threat to you, or could be, to throw them back on the progression ladder, and gain an advantage for future encounters,
this is probably the most compelling reason to raid, and will likely be the sole true purpose for quite a while to come
I can see the point in this, but raiding them would require you to make a huge investment in the first place, not sure if its worth it in the long run. But this could be viable.
With regard to your other points:
This game, while I enjoy it very much, even in alpha state, is not eve. You cannot just wish for a larger playerbase.