Apple engineer reveals the real reason Jobs didn’t allow Flash on the iPhone
yahoo.com
yahoo.com
> Burroughs relays that Jobs’ vehement refusal to support the technology may have had less to do with security considerations and more to do with the fact that Adobe, as a partner, couldn’t be relied upon to address said security issues
The tweet's referenced actually compare the public "poor UI/power consumption" reason to a "lack of open dialog" with Adobe, which meant Steve (and thus Apple) couldn't count on Adobe to respond in a timely manner to security issues.
That is the absolute definition of a security consideration. How/when the vendor responds (if at all) to security issues is absolutely in and of itself a security issue, when the answer seems to be "silently and with no words/never".
“However, the decision was the right one based on both technical reasons and that Adobe was a shiy partner. Almost a decade later, it turns out that Steve Jobs was right. Flash is dead and Adobe is a still a shiy partner.”