Well there are players that are better in the first lines and others that are better as Support/second lines in massive PvPs. The problem is that everyone wants to be i the First lines or being the star of that PvP video on YouTube and forget that that Star probably had someone back him up in that massive PvP video(Most of the time)
RPK is another different story, if said player is not very skill full with that character hes going to fail or just kill afk players for the sake of saying hes pro :P