>There's not enough evidence [to prove it doesn't happen]
What is your idea 'enough evidence'? Do scientists have to gather up every possible reverse transcription gene in the known universe and test them?
In principle, anything can happen. Specific cosmic rays can hit my desktop's memory/CPU in such a way that my computer will display a giant smiley face for the next 10 seconds. After all, cosmic rays are known to corrupt computations in plenty of other contexts.
I can even propose more than 1 possible pathways for that to happen!
>Do scientists have to gather up every possible reverse transcription gene in the known universe and test them?
For sure there could be a more practical way, but even if that's the only option well ... science is rigorous, man. Hence why we still have the theory of evolution and the theory of relativity. If you don't like it and wish to go back to "just believing" ... well, good luck, we won't miss you.
What is your idea 'enough evidence'? Do scientists have to gather up every possible reverse transcription gene in the known universe and test them?
In principle, anything can happen. Specific cosmic rays can hit my desktop's memory/CPU in such a way that my computer will display a giant smiley face for the next 10 seconds. After all, cosmic rays are known to corrupt computations in plenty of other contexts.
I can even propose more than 1 possible pathways for that to happen!