That's like the intelligent design argument. If life couldn't form on Earth without external help, how did it form anywhere else without external help? It makes no sense.

Turns out we do have an idea: Amino acids, nucleotides, and lipids have all been experimentally shown to spontaneously form and assemble in extreme environments. They were forming and bubbling around before the oceans even stopped boiling. After hundreds of millions if not billions of years of bumping around, they finally assembled into something that could self replicate an encapsulated cell and life took off.

It's a lot more plausible the same way that general relativity is more plausible than Ptolemiac astrophysics.