The insistence that they also hunt down their mundane, non-magical half plate is not canon. It's not accepted.
…mundane, non-magical,
gem-encrusted half plate…
If anything looks expensive and magical in the game, it’s that armor
So?
Think about it, Lae'zel scoffed at the notion that her people would come looking for her. It's her challenge to get back to them. But somehow, after she's dead, they're going to come after her armor? It's obviously not that big of a deal to them.
If a Githyanki died to a "lesser" race, then that Githyanki deserved to die. That's closer to the Githyanki mindset.
