>>45441162They wouldn't exist the same way they do now if they were day 1, either.
Dragon was originally designed as a Penultimate Boss Type that resisted all four of Gen 1's starters and had very few answers other than blunt neutral force or packing an Ice Move, odds are Fairy would be seen as the "girl" equivalent of Bug Types, carry none of its Dragon Advantages, and be given to shitmons almost exclusively.
So despite this, GameFreak would STILL invent a new Anti-Dragon in Gen 6, because their game design philosophy radically shifted after Gen 2.