AI users aren’t investing actual work and can generate reams if bullshit that puts three burden on others to untangle. And they also aren’t engaging in good faith.
Rhetoric is the model used in debate. Proponents don't expect to change their Opponent's mind, and vice versa. In fact, if your opponent is obstinate (or a non-sentient text generator), it is easier to demonstrate the strength of your position to the gallery.
People reference Brandolini's "bullshit asymmetry principle" but don't differentiate between dialectical and rhetorical contexts. In a rhetorical context, the strategy is to demonstrate to the audience that your interlocutor is generating text with an indifference to truth. You can then pivot, forcing them to defend their method rather than making you debunk their claims.
The historical meaning of the word 'hominem' isn't crucial to the universal logical principle of 'ad hominem'. If xenoorganisms beneath the ice-sheets of Titan are dismissing each other's ideas out of hand, they too may be committing this fallacy. The fallacy is the rejection of an argument based on its source rather than its content.