I'm glad that Shiny Pokemon are much more available in this generation.
I do understand where you and others are coming from, in so far as they don't hold their rarity anymore, but for me, and i'm sure for the majority that like shiny pokemon, it was more about getting some amazingly different colored pokemon, not about spending weeks or months chasing something down, when there could be something better to do.
Guess I'll share my opinion too. I don't mind it myself, since I have no shame in using the Shiny Charm in B2/W2 (and X/Y if it happens to be in this game as well). That being said, my Rayquaza hunt of ~26000 SR's is my most valued shiny partly because of how long it took. That doesn't mean I liked that it took long (I hated it at the time), but I've never been so happy to see a shiny since that one. I don't think I've ever been that happy ever, actually. What I mean is, while some hunters do so for the shiny itself, others do so for the sense of accomplishment of finding that shiny yourself, and a longer hunt often increases that feeling of accomplishment even if it feels awful at the time. That's why some of us will still hunt for something that could be obtained in some other way, like the Sinnoh Creation Trio, and others will chain for shinies.
Though like you've implied, we all hunt for varying reasons. It just happens that they don't line up perfectly with other reasons sometimes, and that's okay. We hunt for our own reasons, and no one else's opinion should change that. With all that said, I don't want to instigate an argument with this, in case this ends up derailing the thread a bit. Just sharing my opinion on this, and people can make of it what they wish.
On another note, I'm nearly done with the Kalos Dex (no shiny at all either), and I've changed my targets yet again. I will try for Zygarde after all, but only until 8192 SR's (or if we somehow can prove it's locked). I do want the dex completion, though, so if anyone has already caught Zygarde, I'd like to get Pokedex data for it. If anyone can help with that, I'd really appreciate it. PM/VM me if you can help with that.