I think you're massively overstating your case when you say "optimal." There is no evidence anything CL provides is optimal according to any rigorous metric. I could very easily claim Scheme is "more optimal" since it's a much more minimal implementation with the same capabilities. Also I think you are mistaken to equate fewer symbols with easier to reason about symbols, e.g. I find it much easier to reason about complex programs when they are written in a strong static type system, which CL lacks. The type system lets me leverage the computer to help me reason about the program, by type checking.