Back during Wrath dailies were manditory for raiders. Manditory! Don't have Sons of Hodir rep - no shoulder enchants. Don't have certain other factions - no head enchant.
In MoP they aren't manditory - they just speed up the gearing process and unlock enchantments that you could get off someone else on the AH anyway. If you're raiding you can completely skip the dailies since even the gear from MSV outstrips any Rep rewards you're likely to get within the next month or so.
People just need something to complain about, even if its something completely stupid. Like all those people in early Cata whining that they were 'forced' to do Archaelogy because there were a few decent weapons you could get - despite the fact you could get better weapons from raiding.