No. You are wrong.
We don't even have the full game on the Xbox yet, or the PC.. It's still a pre-release software, a game still in development. We'll have the full game when it releases, not before.
As for the rest: SotF is a F2P stand-alone game that has nothing to do with ARK: Survival evolved's development process. A seperate team is working on SotF and PS4 has no early access/game preview program, and this is basically the only way to test any aspect of the core coding on the PS4 platform. Even if the hardware is similar on both consoles, the OS is completely different, which is the main reason i assume they need some way of testing the core mechanics on the PS4, and SotF is an easy way of doing that.
If the game is delayed, that's brilliant. It gives them more time to polish the game. Personally, I'd rather wait longer for a game that'll run smoother than having a bug-ridden lag infested game that barely runs.
So instead of crying, make sure to report bugs to the devs so they can squash them as fast as possible, and get a game that runs smooth on release. Crying about bugs in an Alpha or a Beta for that matter, won't help the devs, and it sure as heck won't help any of us players.