But I do have an idea of what life on Earth requires. EVERYTHING else is guesswork and speculation. We only know what we know.
We know it took 3.5 billion years for multi-cell life to form on Earth. That knocks out most of the stars in our galaxy right there as they don’t last that long. You have to have a second or more generations star for the higher level elements like carbon or (less likely) silicon for long chain molecules to form.
You need a stable area of the universe, a stable planet, and, a planet that shields the surface from the very nasty radiation that is in space, that requires a good bit of iron to form a magnetic field, that also protects the atmosphere from being stripped off a planet.
As for life near the fumaroles under the sea, except for the single cell bacteria, all those creatures are descendants of creatures from the upper levels of the sea that adapted to life in the intense heat. Their ancestors didn’t form there (except maybe the bacteria).
There is WAY more needed just for single cell life. Just having a star, with a planet around it does NOT mean there can be life on that planet.
This is of course going by what we KNOW, not, speculation.
When you know humans lack the sensors to perceive ~98% of the mass in the universe (dark matter) — you know you don’t know anything.
You’re less than a speck, on a planet that is a tiny particle of dust relative to a nebula, what to speak of a galaxy, what to speak of the universe.
And those make up the part we can see... and they are ~2% of the universe.
We don’t understand dimensions and quantum entanglement.
We also don’t understand how time works in all localities and dimensions.
Yet when presented with video evidence of technology beyond our understanding of physics, you START with a macro-statement that it can’t be from outside earth.
These postulations about the limitations of ‘life’ are more absurd than a blind man describing an elephant.