Actually an Asteroid Carrying Organic material is part of a seed theory. Basically a planet with life has a violent ending and explodes or chunks break off.
Pieces of planet float around in a solar system and an a visiting asteroid picks up life and crashes into planets seeding them.
We are dealing with billions of years and scientists have seen closer to the center of the Milky Way the results of several suspected planet explosions. Thus this way hundreds if not thousands of planets are seeded throughout the galaxy and you don’t have to wait for that spark.
I’d never considered that, but it makes sense...kind of like a bird eating seeds and dropping viable ones on a new area when they defecate.
The thing that has always flabbergasted me about space is...where does space go? That’s huge. And we worry about so many small things here on earth.