Earlier quoted context omitted.
I think because the Minecraft world is like a giant tub of Lego. You go out into the procedural world to collect your pieces and then you create from that. It's actually your creations that are interesting and without them Minecraft would equally purposeless and bland.
That's exactly what No Man's Sky is though. There are entire communities centered around colonizing entire regions of the procedurally generated space. People build some seriously intricate bases and it really makes the worlds feel lived in.
In No Man's Sky I got dropped in some world that felt empty with tutorial on how to collect some stuff and how to get to the ship.
The first impressions weren't the same between these 2 games.