Not when the critical infrastructure is the infrastructure for storing and moving those materials.
Also people tend to settle where trade happens and work is available.

Ok, maybe salaries are lower because whole Greenland is in the middle of nowhere, […]

Having visited Iceland, the cost of living is higher on islands with limited agriculture and high cost of imports.

Big deal, a chunk of radioactive stuff and a geiger counter also generates true randomness based on quantum mechanics. https://youtu.be/QzI6GFzH7ZA

In cryptography the provability is the whole thing. It’s provably secure or it’s provably not secure. There is no gray area.

Nobody holds themselves to that standard.
As long as P=NP remains unsolved, they can’t.
Even if we knew P!=NP, we don’t know if integer factorization is in P, but many suspect it’s not.

For those more interested in real world concerns, look into the NSAs elliptic curves published by nist. Many people used that without knowing how it came to be.

I’m wondering if there’s a way [to] combine their computational power.

Only if your problem can be be split up reasonably, otherwise you will spend more time waiting for data to move.
Where it can work: video encoding, CI pipelines, data analysis
Where it won’t work: interactive stuff, most single file operations

I want to get into server hosting […]

Then you don’t need another reason to do it.

[If] I can connect them all to one display [or] make them all accessible in one place.

You can either get a hardware switch or chose a primary computer and connect to the others. For that you can use remote desktop software or be a try hard and use ssh.

“In the year 2045 this satellite dish behind me, which is being dedicated today, will still be here supplying expensive, inefficient internet … A generation from now, this satellite dish can either be a curiosity, a museum piece, an example of a road not taken or it can be just a small part of one of the grimmest and most authoritarian adventures ever undertaken by the American people” - Donald Trump
context

It would be funny because I don’t think twitter has the server infrastruktur or the domain knowledge.

What should they do?
Protest in the designated area so that we ignore them more easily? But not somewhere where it blocks cars? Maybe stop chanting to keep the noise down?
The normal protests don’t seem to work.

Just put it in a formal grammar:

GNU -> GNU's Not Unix's
GNU -> gnu
GIMP -> GNU image manipulation program