But now you're hypothesizing Aliens + some extremely convenient energy source.

In order to justify ignoring all the burning stars, it needs to be easier to tap than solar and much much more energy than all the stars will ever generate. I think that requires new physics.

Really the energy source must be infinite. If you can see that it will run out in a trillion years and you can survive for another billion by harvesting suns, somebody will.

We have nuclear power but still dam rivers, and I think beavers notice.

OTOH If there is a source of unlimited free energy, maybe some of those bright spots in space aren't stars at all.