Earlier quoted context omitted.
Not to take a side, but to answer the question: imbalance. It takes less than thirty seconds for a computer to generate basically any amount of text, faster than anyone else can formulate a response, faster even than anyone can read. It could theoretically swamp a topic. Is that realistic? No idea. I haven't made up my mind on this topic yet.
Your concern seems to imply that you have to be the last one to get a word in to win an internet argument, which I wholeheartedly disagree with. On the internet and in real life, replying a lot and quickly is more often a sign of weakness.
Also I don't deal in "signs of weakness" but try to look at arguments' contents instead. Which is what takes time to evaluate and argue about. Which would waste my time if I'm talking to a (semi-)automated system.