Hello! Games with AA quality 3D graphics cost money to produce. Quite a bit of it. Giving an imprecise release date before it is ready would not finish the game faster, it'd just lead to uncertainty.
Lastly, if your logic here was correct, we would have far more incentive to release a subpar product on Steam quickly than to grind out a complete game experience, as that would be far more lucrative. It's also why so many subpar half-cooked games make it to Steam, and is why our fanbase continues to support us as we put the effort into making the game complete.
We appreciate people would love a Steam release quickly, but it will be released once it's ready.