Except we've already seen people who do exactly that, and being wrong about the future over and over. I'll agree with you that it's fine (and helpful) to point out all the failings of current LLMS; the mistake is extrapolating that out too far and making a prediction about the future. Granted, it's just as common a human mistake to predict the future too optimistically, by believing there are no impediments to progress.

All i'm really arguing for is some humility. It's okay to say we don't know how it will go, or what capabilities will emerge. Personally, I'm well served by the current capabilities, and am able to work around their shortcomings. That leaves me optimistic about the future, and I just want to be a small counterbalance to all the people making overly confident predictions about the impossibility of future improvements.