I am not willing to grant the same level of exculpation on the basis of reasonable forseeability to a software/AI dev that I am to a carpenter making a chair. The history of our trade has in it found great joy in how to use things in ways they were never intended, which much more than a carpenter, puts a burden on us to take the propensity and possibility of abuse into account amongst ourselves.
So no. Mr. Altman, and the people who made this chair, are in part responsible. You aren't a carpenter. You had a responsibility to the public to constrain this thing, and to be as ahead of it as humanly possible, and the number of AI as therapist startups I've seen in the past couple years, even just as passion projects from juniors I've trained, have been met with the same guiding wisdom: go no further. You are critically outside your depth, and you are creating a clear and evident danger to the public you are not yet mentally or sufficiently with it enough to mitigate all the risks of.
If I can get there it's pretty damn obvious.