I'm sorry you feel so cynical about this. It's absolutely true that Google is profit-seeking, that these models are very expensive to build, and that if there's a competitive advantage to be had, Google should probably try to retain it.
But even with that all being true, real people (typically some thoughtful researchers) build these models. And my point is: _there really are ethical reasons to keep large generative models trained on flawed data away from the general public until better safeguards are in place._ You can verify this for yourself by reading about ML bias and safety. Don't let cynicism keep you from internalizing that fact. OpenAI didn't make GPT-3 widely available for the same reason.
At the end of the day, Google doesn't need an excuse like "we have ethical qualms" to not release the models. Stuff that is really secret sauce you won't hear about until many years later when it's not a competitive advantage anymore. Google _does_ need to cover its ass and not deal with its employees yelling that it helped perpetuate algorithmic racism, or surveillance state, or increased levels of inauthenticity on the internet.
When I said "Google has a responsibility" -- I don't mean that the faceless entity feels responsibility, I mean the people who work on the specific things have a responsibility and they do feel & act on that. If you work on lifesaving drugs that could also be dangerous / addictive, it's kind of on you to be thoughtful about how to make them generally available, no?