Op, don't you think that wearing a paid signature to conduct your alleged experiment is unethical or cheating? You do not contribute to the community, but rather trained an AI to write on your behalf and you getting paid weekly?
Your experiment would have been sane if you were not getting paid.

For your question of if we can win this AI war.
I do not think we can win it. But I am sure something will have to happen in the nearest future. AI will be so abundant in the forum to the extent that human written conversations will be scarce. By this time, campaign managers will have to scan the whole profile of any user in order to be able to hire anyone whose profile is 95 to 100% human written.