That is correct, but that doesn't mean filters don't work. So far, 95% or more of the transactions adhere to the filters imposed by the peer-to-peer Bitcoin network, which provably shows that the filters work. Their goal is not to fully sensor transactions, their goal is to rate limit transactions so not to fuck up the experience for everybody else. It's really not hard to understand. Core's arguments are just dishonest and can be falsified by empirical data from everybody's bitcoin blockchain.