I agree with your second point, but the reality is you can't blame people for thinking the game was something different when it's all based on waht Sean has been saying for years. It's not like he was slyly avoiding saying things, he was flat out lying about things.
At the end of the day, procedural generation isn't going to produce a quadrillion different environments that all feel meaningful, it's going to produce exactly what is put into it, with a bit of fringe variety laid on top based on some variables. Like, procedural generation isn't going to dynamically invent new ways for plants to form or entire new types of plants, it's going to produce variations of animals and plants within certain parameters where the various sliders are effectively random. Games based on this sort of thing can absolutely be a load of fun, but basically every other survival sim out there relies on either basebuilding, multiplayer, or a bit more guided of an experience (Terraria style). When you make it completely flat, it's going to get boring.
I mean, imagine Terraria without building, without the enemy variety, without the weapon variety, and without a single boss or event or anything. That's NMS. Randomly generated worlds that you can plink around and walk around in.