Piglins don't get angry at players that break a decorated pot. Since this block is technically a container it'd be expected for piglins to aggro at players that break them, like chests or shulker boxes.
How to reproduce
Spawn a piglin near you.
Place a decorated pot.
Break it.
Notice the piglin doesn't aggro at you.
Expected result
Piglin would attack the player after breaking the pot, even if it's empty.
Observed result
Piglin doesn't attack the player.
They only get angry when breaking/opening chests or shulker boxes, not any other container (eg not furnaces, crafters, dispensers, droppers, decorated pots, smokers, blast furnaces, chiseled bookshelves, etc.)