The vendor has already distributed the software with the QA done as thoroughly as possible/ practical, issued a TOS denying a warranty or any sort of protection from failure - that we all agreed to - and yet the litigation is inevitable if something happens to the end-user on account of a vulnerability in the software.
Its not their computer, but in our litigation-happy cultural climate, its their responsibility. No one is preventing us from doing what we want with our computers with this flash issue - just reducing liability.