Argumentum ad populum. Give me one good reason why other beings in FET would need to live on the planets that we can see in the sky.
No my argument is not "most people believe it, therefore it's true" FFS.
I'm saying other scientists have studied the problem and have suggested that planets are required for life.
The reason is to do with the elements that are required for life, which are produced after a star goes supernova. As planets form in the debris they create a concentration of these elements, and so create a concentration of the known building blocks of life.