Okay if every planet looks like that then find me 10 screenshots that look like that. If you break it down to "Some have trees, some have grass, some are a different color" then of course you'll be able to say every planet looks the same. But using that logic every game looks the same because they have shapes and colors. That is an absurd line of logic.
https://www.reddit.com/r/NoMansSkyTh...g_water_world/ proved you wrong. Look how easy that was.