Sure, it seems plausible that an AI developed by humans will on average end up in an at-least-marginally different region of mindspace than an AI developed by nonhumans.
And an AI designed to develop new pharmaceuticals will on average end up in an at-least-marginally different region of mindspace than one designed to predict stock market behavior. Sure.
None of that implies safety, as far as I can tell.
Here is another example of an outsider perspective on risks from AI. I think such examples can serve as a way to fathom the inferential distance between the SIAI and its target audience as to consequently fine tune their material and general approach.
via sentientdevelopments.com
This shows again that people are generally aware of potential risks but either do not take them seriously or don't see why risks from AI are the rule rather than an exception. So rather than making people aware that there are risks you have to tell them what are the risks.