As I've said, I think there's probably some truth to the idea that AI companies may be incentivized to inflate the dangers of their product for financial and strategic reasons. However, when all of the major players in an industry are telling us, flat out, that the thing they're building could be very dangerous, it seems ridiculous to write their warnings off completely. If a guy built a weird contraption, handed it to me, and said, "Careful, it might kill you," I'm going to tend to take his warning seriously. It might be a hoax, sure, but if I know considerably less about the contraption than the guy who built it, I'm probably not going to just assume it's a hoax.
I'm not aware of any example in history where almost everyone INSIDE a particular industry is united in saying that their own product might be catastrophic for mankind. The climate alarmists have said that about the fossil fuel industry, for example, but the climate alarmists are not inside the industry. Notably, the fossil fuel industry itself has generally disagreed with their assessments. That's why the climate alarmism comparisons here just don't hold water. It's a totally different situation.
So, while we should be cautious about taking anything at face value, I find the firm "there's nothing to worry about" claims to be pretty ridiculous. This is an extremely powerful and rapidly evolving technology. Any powerful technology carries risk. If the people building this technology say the risk is high, again it seems foolish to blithely assume that all of them are conspiring to simply lie about the dangers of their own product.
Another read on the situation -- one that allows you to doubt the benevolence of these people (as I most certainly do), while not necessarily discounting all of the hazards of the thing they're building -- is that they pushed full speed ahead on this technology, blew right past the warning signs, and now they're seeing things on their end that legitimately scare them, and the PR blitz in the media right now is a classic case of corporate CYA. When the shit hits the fan, they can say, "We tried to stop it." Even though they actually could have stopped it, but didn't, when they had the chance. That seems like a plausible scenario, too.