SPV wallets have existed since the early days of Bitcoin, I believe full-node proponents wouldn't mind another implementation of another kind of light-client.
They wouldn't mind that others use them if they want to, sure, but I don't see why they would. Think about it, if you are using a full-node client, it means you want to have your own copy of the history that your client has verified and ticked as correct. Why would you go from there to trusting my version or a different one, as mentioned in the OP?
It could surely be an attractive option for those of us used to light-clients, but I wasn't thinking about that user base when I wrote that post you quoted.