Re: The Fermi paradox.
Large moons around gas giants seem common. (Several in our Solar system). Gas giants in the habitable zone seem common (many such exoplanets detected).
Surely the deduction is that ET is more likely to be living on a large moon than a small planet.
Also there's no problem I can think of with life evolving on (or in) a suitably warm gas-giant. It's thought that Earth's original atmosphere was much like Jupiter's is today. It's even possible that some day we'll discover high-pressure-tolerant life under Jupiter's clouds (Jupiter gets warmer the deeper you go). Speculating, I'd agree that it might be hard for such life to attain technology, for lack of anything solid to lay its (presumably non-existent) hands on.
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