Is that good, though? I've seen a number of people compare AI to nukes, and I think that's sort of a good analogy. The thing is, it's really good that not anybody can make their own nukes. Instead, they're (mostly) in the hands of powerful countries who all have some motivation not to use them, because if they fire them they'll end up in a nuclear war that makes them less powerful. If terrorist groups had easy access to nukes, they'd likely be a lot more likely to fire them because they have less to lose (and more insane ideologies).
With LLMs, I understand why people look very negatively on the prospect of them being controlled by major corporations - certainly there are huge issues with that. But if we believe that they're going to develop world-ending capabilities, I would rather they be in the hands of wealthy, powerful corporations that are strongly incentivized not to destroy the world, vs. being freely available to people who want to burn it all down.
Mutually assured destruction works because the only people who are party to it are those who don't want to be destroyed. If everyone has access to world-ending tech, it only takes one person who doesn't care to end it all. In that sense, asymmetry is very good.