Just look at the long string of processes the chemists had to go through to make that RNA in the lab. Even then its just white noise and gets destroyed in the presence of oxygen.
& yes everything gets degraded over time. The question is what is the balance between self replicating & degrading? People degrade but not before self replicating.
wonderful animations. *yes people degrade constantly but not to the point they cannot self replicate (an assumption buried in previous mRNA enzyme posts)