And the answer is the same answer to be found in multiple industries: engagement.

Don't compare women's percentage in the general population to the percentage of women working in the position. Compare women's percentage of the APPLICANTS to the percentage of women working in the position. Don't whine about how few women are on boards for major businesses when there's 3 male entrepreneurs for every female entrepreneur. Don't whine about how few women are in STEM when women make up only 16% of the applicants for STEM admissions. Don't carp about how few female politicians there are when there's 7-8 male candidates for every female candidate and every riding association in the country has to hunt down women to run.

Before we drop the blame on 'discrimination' as we always seem to, prove to me that women apply to become head chefs at the same rate men do, that women put in the same hours as their male peers, that women seek out culinary awards as often as men do ... etc.