I'm not taking their side, but has anyone seen any actual evidence of their embedded spying or backdoors? It's notable by its absence.
By way of definitions, I mean for example a hard coded URL or IP address traced to a suspicious server in China, and combined with Wireshark traffic logs of significant and suspicious outbound data that are something other than harmless checks about firmware updates.
You'd think that somebody would have documented some specific details by now. Firmware dumps, Wireshark logs.