It's a form of pvp, by attrition.
This game, like many other mmos, has many forms of currency you can use to your advantage.
-Time
-Money
-Numbers
-Wits
-Luck
-Persistence/stubborness
To name a few.
Now you decide how you want to play at any given situation. I for one, feel like being persistent is my main form of currency when facing greater numbers or I am being heavily outgeared.
Even though I am lucky enough to be in a pretty strong alliance I never ask for assistance when I am facing greater odds.
A) Because that is not reliable at any given moment and,
B) Because I find it extremely satisfying when I overcome hurdles alone.
Last night I had to fight for almost 4 hour to secure a spot in Beleth (No a worthwhile endevour) against a bot group that decided to afk right next to my pull. Literally 10 protectors came for over 4 hours with some being extremely overgeared comparing to me. In the end I "won". Got killed several times, spend few resources and time. Was it worth it? logisticaly speaking probably not!
Did I have fun fighting/griefing/trolling 10+ ppl? Absolutely yes.
Did I make an impression to them that I am not a person they want to bleep with? Absolutely yes.