Yeah. The event isn't going to wait for me to get another class leveled to 99 and geared thats party friendly and lets me do what I want.
It's not going to wait for me to find a more welcoming set of people who are just going to be ok with my under-geared RDM sitting on the front lines, or even just going /sch to support. (read:not main heal).
Those are special cases and exceptions that tend to show up rarely among desperate or generally more accepting players. So, I go on, I look to see if there's some friends I know wanting to go in, then I go in - alone if I have to.