From Adobe's point of view, Google is doing the work to support Flash on Linux via Chrome. Why should they spend more money on it?
YOU would be well served to take a step back and consider what it is that you really want out of Linux. Do you want a locked down platform, where there's a single, unmodifiable, uncustomizable version of X, for any X you could name? Controlled by a single company? There are plenty of platforms like that out there. Linux isn't one of them, and hopefully it never will be.
It's really irritating to see how many people want to turn Linux into another clone of OS X. If you want OS X, why not just buy a copy?
I also take issue with the idea that Linux is somehow a hostile platform (partly because the company I work for develops almost exclusively for Linux). But this comment is getting too long as is, so I'll leave it at that.