No one has claimed you said or ask the question which I had raised and then commented on.
Regarding your comment that intelligent beings “will end up colonizing planets around red dwarf stars,” such planets would not have an Earth-like natural environment, although domed communities could be built with an artificial environment.
Another possibility is that a sufficiently advanced intelligence could build a Dyson sphere around the red dwarf, to harness practically all of the energy emitted by that sun for providing environmental conditions in which to live.
I like the idea of Dyson swarms better than Dyson spheres. Think of the stress on the sphere material as you get closer and closer to the poles. Seems like a pretty difficult engineering problem, even for future engineering gurus.
But anyway, your point is well taken. Swarm or sphere, lock in most or all of the red dwarf energy and have a completely-enclosed domed world outside the orbit of the swarm/sphere.