if my network hardware is compromised, but all of my communication is encrypted, that leaves… traffic analysis? hoovering up the data and storing it to decrypt in the future when it becomes feasible? using the router as a foothold to attack the rest of my network?
The first two are already happening for data that leaves my LAN. Unencrypted data on my LAN is vulnerable, and there is plenty of unencrypted traffic on my LAN in practice. Is that the risk?