DNA doesn’t drive evolution, and isn’t actually vital to the life of cells: some cells get by with no DNA for months. OTOH, neuronic cells use DNA to build various neurotransmitter chemicals and do it all the time.
Nice non-sequitors.
Well, Ok, then mutations to DNA drive natural selection which over eons drives species change , aka evolution. Bu the cells would not be made without DNA so I would hold off on statements that cells dont need DNA.
Several examples of cells without nucleic acid - red blood cells- they only last a few weeks at best. But without DNA they cannot replicate.
Most neurotransmitters are not proteins but they are fabricated from enzymes that are proteins made from instructions included in DNA.