Being beholden to proprietary providers for important bits of software does not solve the problem in anything other than a supercifical way.
Indeed in this case it's made the problem _much_ worse. If it hadn't been really quite easy to 'get flash now' for so many linux users we'd have fixed the flash problem years ago and gnash and lightspark would have a great deal more developers. But nearly every Free Software/Open Source person I know just installs adobe's flash player and says 'what problem - my computer seems to be working?' I find that pretty depressing. I know it's annoying but this stuff matters and if we can't be arsed solving our own problems then we have no-one else to blame (well, except maybe Adobe for making this awful mess in the first place).
If Adobe is about to stop supplying flash plugins that might actually help direct a bit of effort to a genuine solution (although I guess most people will just stick with the version they have). Gnash and lightspark really are quite good these days. Having been using them both for years I can tell you that somewhere between 'quite a lot' and 'most' stuff now works, so it's perfectly useable day-to-day but you get an incentive to report and fix the sites/players/apps that are still bust.
BBC iplayer would be a good target for example, which still says 'you have the wrong version of the flash player, please f*ck off from our nice publically-funded service, low-life' (I paraphrase slightly)