Well, tbh it's not entirely incoherent.This comment / reply is literally everywhere people are talking about this update, every few minutes. It's one indication of how incoherent this update is from both a narrative and gameplay perspective. It just doesn't make sense.
It's impossible to use Guardian weapons against Thargoids in HIP something both in Odyssey and in Horizons - only for different reasons.
(In Horizons your weapons won't get disabled, but there are simply no Thargoids there to shoot at.)