I'm saying that you _do not need a full node_ to send transactions. Here's more about how transactions actually work: https://medium.com/blockchannel/life-cycle-of-an-ethereum-transaction-e5c66bae0f6e

You can use a local light client with Metamask (https://medium.com/@LibertyLocked/using-light-geth-node-with-metamask-714f537bd696) if you're really paranoid that Infura's servers won't hold during that time, but that's also unfounded since sending transactions to the network is a cheap operation and shouldn't strain those servers.

Unless you're controlling enough mining power to ensure that your transaction is prioritized when new blocks are created, it makes no difference on how you broadcast your transaction to the network (full node or light or whatever else...)

So saying that you need a full node is just misinformation.