He may not know what private key or seed phrase is. He may think everything needed to access bitcoin is the wallet password but which is not true.
He may even argue that his wallet forget the private key or the seed phrase but which is still ignorance.
This is what comes to my mind after seeing his tweet, he looks like a boomer who is stuck with centralized systems which require a username & password to open an account. From here we know that he criticized Bitcoin without knowing everything about Bitcoin. It could be that right now he also thinks that fish live in the air & birds live in the sea because of his logical flaw in assessing things.