These data leaks are indeed very bad, but in what way do they make the actual core product and its security goals "worthless and entirely irrelevant"?
Whatever security goals they claim to pursue exist only in their marketing copy.
The data leaks don't affect that, though they're still a serious problem since they exposed customers to different sorts of attacks.
Of course they should be doing both, but there's an easy, pragmatic workaround until then: You can just buy their devices on Amazon. (This does somewhat increase the chance of supply chain attacks, but that's always present, and I believe Ledger devices support hardware attestation in addition to tamper protection.)