What's with the lack of players that believe in themselves?

[MeiUshu]

I was running Great library trying to lvl my paladin to 60, and ran into a healer that had a lack of faith in her ability to keep me alive and a blm who was new to the dungeon who thinks because he's new he automatically believes he can't kill as fast as the other guy( just fire 2, fire2, flare). Why are people like this? I was in a dungeon where a tank did a large pull, and I sadly failed in my task to keep him alive. The tank said "fine let's do small pulls ", I said "no give me a second to adjust". We tried the large pull again and no one died. Why can't people believe in themselves a little more?

and why is that even bothering you ?