It's an excellent multiplayer mechanic because it allows for creature decks to avoid kingmaking scenarios, or purposefully engage with them in order to play politics or create periods for player interaction
"Any target that isn't a Dinosaur" means any non-Dinosaur creature, any planeswalker or battle, or any player (no matter how old they are)
I also found the slider at the top of this store page convenient, since it highlights sets which are and are not legal in Standard
Still, there's a huge group of players who want high-quality proxies for their cubes or kitchen tables, and Wizards could fill this niche, rather than having some percentage of these players hand their money over to counterfeiters
It also means that some effects are so bad, that they arent worth a card on their own
Unfortunately, my opponent had the foresight to add a card to their deck that I didnt - a skeleton they could resurrect