All this seems to do is say you can't use "the AI model did that, not me" as a defense to escape damages in a civil suit, it doesn't change the extent of encouraging suicide that someone could be liable for.
If you trained your AI on the persuasive skills of a death cult then you are responsible.
If the parking meter pulls out a chainsaw and kills someone then either the operator of the parking meter or the manufacturer is liable depending on whether the manufacturer waived responsibility of the parking meters actions *and* the operator accepted them. We wouldn't say the parking meter is liable, but we would ban chainsaw wielding parking meters as well.