This is one of the most ridiculously incorrect arguments I've seen.
And the Monero people all hate me because they see me as a maxi.
And they're pretty much right.
But what I am not is someone that's going to make arguments that are based on lies like this or half-truths kind of.
The tech used in Monero is the gold standard for a private blockchain. It is a different set of trade-offs and it has different risks and benefits than the Bitcoin blockchain. And frankly, I think they can coexist.
The attack surface for trying to break menero's privacy has been tested much more than anything on Bitcoin. Lightning is still very nascent, and though it offers some tremendous privacy ideas, they are far more attackable I think than anything menero does currently.
Liquid at least implements confidential transactions and inherits quite a bit of minerals privacy that way though their transaction set is still very small making it fairly moot at the moment and of course purest maxis don't think liquid is a shitcoin.
Arguments like this might have an effect on a certain amount of people, but they aren't going to win the game. If you want to win the game, do something to bring the narrow level privacy to Bitcoin.
Otherwise, figure out ways that you can buy Monero KYC-free and know that if you spend that, they're not going to be able to trace it.