I know it wouldn’t be a lot at first, but over time, the extra tonnage that didn’t develop on the planet will add up.
Hell no!! Those doped up parasites living off of working people can’t be beat. That is why only people that pay income taxes should VOTE!!
cost / benefit
This is just a ruse. They really want to start regulating outer space. The bureaucrats hate freedom.

This is kind of fitting. We don't think about it much now, but in between the Louisiana purchase and the 1890s there were decades where not much was really known about what was inside the continent. It was just too difficult for most people to get into the west, let alone get back to the settled east coast and let people know what was there.
In this period there were photographic expeditions by the USGS, mapping the interior, especially for railroad routes, and for natural resources. The first photographs taken of the Rocky Mountains were taken by the USGS.
We need good Tractor Beam technology in order to bring all of that Space stuff here without risking the lives our Astronauts. .
My dad talked about mining gold from asteroids thirty years ago. He was a terrible father but he was also a genius. He said the problem with mining said gold was radiation. Of note he was also an engineer and worked at San Onofre nuclear plant.
Everything you’ll ever need to know about mining asteroids:
https://www.amazon.com/Islands-Space-Planetoids-Dandridge-Cole/dp/B0007DZSR0