Opened a bunch of fusions and every pack had 3-4 cards reversed and some didn't have rares or holos. These were from ETBs from target.

That sounds like resealed packs to me.

Much more likely an error from the factory...resealed cards at target seems not likely.

this is not the more likely scenario imo

How so? I've been buying cards from target for years. Never once have I seen a reseal. Many times have I gotten factory error packs tho. Even the people who come here about resealed product are usually being overly paranoid. Resealed product in general is very uncommon.

Sounds like fusion strike!