What makes you assume the AI companies actually want to create a super intelligence they can’t control. Altman has stated as much. Musk definitely wants to remain in power.
Not yet, I agree, but who is to say they couldn't?
Limiting life to cell based biology is a somewhat lousy definition by the only example we know. I prefer the generalized definition in "What is Life?" by Erwin Schrödinger which currently draws the same line (at cellular biology) but could accommodate other forms of life too.