Why is shield swipe so bad?

[Gilthas]

Wars have maim and storms path and eye that they can keep up indefinitely...

*rolls eyes*

And PLDs have Rage of Halone debuff and overall better defensive cooldowns, each job has it's own thing. That's a really silly way to make an argument for Shield Swipe to give 10% damage reduction for 10 seconds, which is better than what Foresight gives, an ability that's on a 2 minute cooldown and that lasts for 20 seconds.