a) some of these bugs where filed months ago, and yet those hotspot "optimizations" are still on by default
b) it's true that some problems can be avoided by deliberately disabling these optimizations, but w/o raising big warning alarms to users, people aren't going to know they need to go out of their way to do that. For crash bugs, it may not be so bad -- they see the crash and google to find out why it crashed. For miss-evaluation of loops that can lead to silent data corruption it's a different story -- how would users ever know that they need to disable those options if developers don't yell and holler from the roof tops?
A freelance is one who gets paid by the word -- per piece or perhaps. -- Robert Benchley