They don't need to be 1000x safer than humans. If they are 2x safer than humans, that is plenty for me to support using them. The issue is determining how safe they in fact are, to appropriately high confidence, before putting people at risk.

That is something that "tech" companies will in all likelihood never be able to do, since they seem uniquely designed to betray and lose the public's trust at the earliest opportunity.

"Tech" companies have become far too culturally accustomed to dishonest hype, "growth hacking", marketing BS, PR spin, etc. for their statements to be trusted, especially when there are life-and-death implications.