Colonizing a star seems too crazy, like Looney Tunes crazy.
Why, more crazy than traveling space, lasers, flying a chunk of metal through the air, teleportation, phasing into different space? I am not saying literally anything goes, but where exactly do you draw the line of science fiction and why? Because Dyson Sphere is a thing in science fiction.
We can already travel in space. The Hyperspace thing is a necessary game mechanic to make the universe work, in a sense.
We already have lasers, we just haven't weaponized them.
Teleportation and "phase-space", I suppose we can't say 100% they don't exist in any phase whatsoever, and they're there for a game mechanic to show off the capabilities of high-tech anyways.
Dyson Spheres are about building a megastructure around a sun to harness its energy, not about colonization.
I cannot continue to exist
near the surface of the sun as an intact human being. I would not even be fortunate enough to continue to exist
as a liquid.
Not a single building material we have is a solid at the temperature of the surface of the sun. Most of them aren't even liquid. Tungsten is one exception as it's barely a liquid at that temperature, but that'd vaporize too if the sun was just a bit hotter, not even 100K hotter.
That's just heat, I'm not even going to mention the crushing surface gravity.