Normals are for leveling...tank who is leveling in dungeons have to run around 40 of those dungeons to get to 60(there are only 4 instances open for leveling), Its safe to say he will do anything to not make it boring/slow. Normals are also super easy, so get used to it or play mythic, but you sound like those ppl who couldnt do Proving grounds in WOD to even start heroics so good luck with that :P