Webnovel Author: H3LL0_W0RLD - Novel Collection

One of the stories that got picked was 2.35 stars, this one is 3.79 stars. This isn't a very valid point with that in mind.

Building something on the scale of a planet isn't astronomy, it just isn’t. Also mining away an entire planet and bringing its materials to the sun would require quite a lot of resources as well. This is also completely disregarding the energy requirement for any of this. At this point in time, mining has a theoretical minimum of 53 Terawatt hours per year, this is just a minuscule amount of mining compared to mining an entire planet away. Only the first half-mile of the Earth's 30 mile thick crust has been mined so far, in thousands of years. It would take so long and so much energy to just mine a planet away that it really isn't worth it for a dyson sphere that we don't need. It would likely take hundreds of trillions of Terawatt hours to just mine away enough material to build the sphere, much less to transport the material or even build the sphere itself. Then we have to look into building the transports. Oh wow, that’s even more material to mine and more energy to waste! All in all, building a dyson sphere is a poor idea because it takes too much energy, resources, and it would probably take billions of years to even gather all the energy required to mine the resources for it (this is including the growth of our ability to generate energy).

The sun still needs to provide light and energy for the rest of the solar system too, not just the earth.

I think that the point he's trying to make is that it's not that it isn't possible to build a complete dyson sphere around the sun. But that doing such a thing would be stupid and illogical as not only do we not have a use for the excess energy even if we do survive the construction of this massive project, but we also wouldn't have the resources to even build it without destroying the solar system.