What they're proposing now, is voluntarily staggering the pace of development.
IMO, we don't need to trust Dario or his bedfellows, to do this out of their goodness of their heart. Even assuming (for good reasons) that they are selfish and care only about short-term profits for their investors, this is still purely a business decision. The exponential pace of AI and its impacts ARE short-term. And so, the negative consequences that they might face is also short-term.