Avoiding Stat Requirements on Items

My Current Stats: 29 Dex
Item Requirements: 30 Dex
Item Buff: +12 Dex

If I equip an item that is +3 Dex, I can equip the item that requires 30 Dex.
Once equipped I gain the +12 Dex of that item.
I can remove the +3 Dex item.

That doesn't seem right.

I would have thought that items would have the stat requirement measured PRIOR to adding any stat buffs - not after?

This seems a way to cheese the requirements, where really, I should be stuck with the +3 Dex item (which is not otherwise a good item).

Thats not a bug, its a feature, has been this way in POE 1 and Diablo 2 and we appreciate that.