So, Scepti, two thoughts, since you agree Molecules 'resist' downward pushes, in other words, push upwards, that means that at some point, the amount of pressure put down by air can't withstand the upward pressure air exerts, that must mean the force of the net push must change at some point in the atmostphere.
The force changes all the way to the top of the dome. It's a dense compression at the bottom that becomes less dense as it rises due to molecules changing their state into their respective gases and so becoming less dense as they expand.
Which does nothing to change that the force of upward resistance must eventually overcome the downward force of "Gravity in all but name" air pressure, given that only the downward push of air pressure and no other force counteracts the upward push.
Additionally, if no molecules can exist in a perfect vacuum, at all, whatsoever, then how can the earth be inside it? We are nothing if not molecules, as is the supposed Ice Dome
Because the earth is a cell. And within that cell, all the elements are kept in a rainbow shaped sandwich layer which all have pressure, except the very last molecules become zero pressure, creating a zero v zero = absolute zero outer dome against space. Everything else functions because everything else is under it's own pressure.
You have contradicted yourself. You have stated that Molecules both cannot and must exist inside a perfect vacuum. as you say we, the earth, are molecules existing inside this perfect vacuum, while you also say elsewhere that no molecules can even be put into a perfect vacuum.
Oh, if you sink a Submarine just underneath the surface, flood it, and then pump all the water out, it won't flatten out, as the water pressure isn't sufficient to properly compress the metal of the sub.
Go and fill a tin can full of water and get a pump to suck the water out. Come back and tell me if the can stayed normal, or it became a crumpled mess.
Right after I make the can out of steel, add in structural supports, and design it to withstand several atmospheres of pressure from the outside, sure. A Submarine and a tin can are alike pretty much only in that they are cylindrical and made of metal, and even those two likenesses are barely alike.
Another thought, not that I expect a coherent or logical answer. Take an airtight container full of water and air, with a vacuum hose covered with a watertight but not airtight seal. Begin vacuuming out air out of the container. What happens to the water?