How did we end up with food and cooking largely outside school curricula?

I found the following information on the level of public support for the idea that children should be taught to cook in a Health Canada report:

... almost all respondents believe that it was important to teach children to cook; 98.5% of women and 95.3% of men thought it fairly or very important to teach boys to cook and 99.2% of women and 97.6% of men were similarly in favour of teaching girls to cook.

The study cited as being the source of this information is British, though I doubt the results would be dissimilar in Canada. Interestingly that British study was conducted shortly before cooking was pulled from British school curricula.

That said, trying to teach cooking in a relatively multi-cultural classroom with different allergies and whatnot could be a major pain I'd imagine.