It's not just that it's macro'd - it's macro'd with no GCD, which means u can keep spamming the macro without lowering your normal DPS.

Blizz just want there to be an associated cost with the decision to go after a Shaman's totem's - i owuld expect Blizz to change /petattack to trigger the GCD, since a pet on defensive stance will automatically go after the master's target as soon as they start attacking...but who knows?

Cheers,

S.