NOBODY mines to a seed phrase. You mine to a PUBLIC address.
I am not defending the author of the topic. It is quite possible that he really wants to steal users' coins. But as for the seed phrase, it is enough to remember such tokens as Meridian, Jupiter, Mine2Mine Coin and others, where the seed phrase was written when setting up mining. Some used the seed phrase of their main wallet, but it was correct to create a new empty wallet.