Guiding policy is a rather small part of being a politician and usually something (at least in the US) that is dealt with partially by aides. Being a politician

Guiding policy is a rather small part of being a politician and usually something (at least in the US) that is dealt with partially by aides. Being a politician in a democracy is about winning elections and forming consensus in democratic bodies once elected. Being in industry doesn't necessarily prepare one to have those skills - example left to the reader.