I don't buy your assessment that an untraceable UTXO is *required* on your ln channels for complete anonymity, though it certainly does improve it. Omce you open a channel, the only public information available is who you opened a channel with, not who you transacted with. One does not need to be a sysadmin to run a private ln node, there are packaged solutions available. Agreed the tools can be improved to increase privacy in a straightforward way.