Why in the prologue people are astonished by "floating rocks"? Why do they point it out?

Okay, as for Habitat 7... That's a planet with a fully functional atmosphere. It just isn't compatible with humans. AI they can't breathe the "air" there. This isn't speculation, or a long winded explanation either. Its directly stated in-game.

As for your "Why didn't they JUST" as far as Alec and Ryder changing helmets: Evac was not "30" seconds away. It was 3-4 minutes away, and Ryder junior had already sustained enough damage to lose consciousness, both from the inhospitable atmosphere AND a botched transfer from SAM. This is explained via cutscene and convo after the fact.

The scourge moving? There are NUMEROUS references as to how it seeks its targets. Conversations and at least THREE cutscenes. (Fleeing the Archon, Meridian, and the final battle) as well as several references with collectible anomalies.

I'm not saying there aren't inconsistencies, but these mentioned here aren't for lack of proper information being presented. If you make it through the whole game without being aware something like the scourge can move that is most definitely an observational error on your part. You could blame the disinterest on lack of suspension of disbelief, but you really lose that point as you threw down money for the scifi genre in the first place. If you don't buy into those tropes, again, you have no one but yourself to blame for buying an item that is centered on them.

*face palm.
Ithe clear you did not understand what I just wrote. A statement of a vacuum does not mean nothing is there bUT a lack of element (gas) in one location apposed to another location causing a draw of that element to where it'says not due to pressure. That is boyle'so law....aka

en.m.wikipedia.org/wiki/Boyle%27s_law

What you keep missing is that planet lacks oxygen. It any environment lacks a gas and pressure element of that gad is present a vacuum is made. It matter not if it has an atmosphere. As the element is open and the gas move suction is made and a event of a vacuum is created. It's literally how we breath.

1. Osmosis is just a term used for water and liquids though a membrane.
2. Boyle's law is for gas exchange. And it still vacuum.

Add boyle's laws is what allows being the breath. I had to study this for a year as a medical student. I know this for a fact the boyle's law causes vacuums and is used for breathing.

we are pointing out that it a you issue. Your like one those people who hate interstellar because they think that gravity effecting time part of the plot makes no sense.

vacuums are caused by negative pressure.It's how we make synthetic vacuums. Hell, the increase and decrease of gas presume is how we breath. The literal boyle'so law.

when refer to a vacuum I'm refer to a state not that that it's close to a true vacuum. I mean that the effects of a vacuum will happen. As boyle's laws stated based on volume and pressure gas will move from one location to another. My point is the even with an atmosphere the planet will still act like a vacuum because it lacks oxygen. And based on boyle's law anything with oxygen in that environment will have all of it sucked out once it has any opening.
Boyle's law is still a part of how vacuums work syteticly made or natural.

we are pointing out that it a you issue. Your like one those people who hate interstellar because they think that gravity effecting time part of the plot makes no sense.