Please explain how you arrive at the conclusion that an Earley parser optimises entirely for the wrong thing. What is the wrong thing? Competing with a manuall

Please explain how you arrive at the conclusion that an Earley parser optimises entirely for the wrong thing. What is the wrong thing? Competing with a manually written parser is easy: Earley parsers are derived from a CFG in standard format, such as ISO EBNF or IETF ABNF. Such a grammar is much easier to reason about than parser in a general programming language such as C.