When someone suggests you use flash more

[Tyrial]

Scorn has no enmity built into it. It's just a dot that enables bleed, all it does is give a little bit of enmity through damage but you can easily hold aggro with out Scorn (I've done it several times). It's a skill to use because it's there. It would be nice if SE added an Enmity stat to Scorn, then it will actually become useful.

I never touch Spirit unless I need to use it, it does little to your threat generation because it does not have any enmity built into so the only enmity you'll get from it is from the damage which is minimal since you're taking a 20% hit on your damage anyways from Shield Oath.

It's definitely not needed to hold aggro, but that'd be like saying: "Gee...I've got to move these 5 large stones from next to this tree and deposit them over by the shed." Then you look around, see the wheelbarrow you just brought over with you from said shed and say "Screw it, I'll just carry them, I don't need the wheelbarrow to do this."

Bit of a weird analogy, sure, but you get the point.

Our job as a tank is to maximize our performance. We can still pull decent damage numbers while in shield oath, we've got mitigation tools to allow us to not even use shield oath for some content. There's no excuse for not maximizing your potential and making the most out of what you have, even if it's "just a little bit of damage". Kitru summed it up very well.