Also, most people who want to use the TFW program need to show a certain bare minimum effort to hire people who live in Canada, but not for agriculture!

employers won’t be required to meet TFW Program minimum advertising requirements or submit proof with their LMIA application.

Then again, what the bare minimum effort to hire Canadians often looks like is job postings, and maybe even interviews, for jobs that they will never actually hire a Canadian for because that costs more than a TFW.
The difference between “required to look” and “required to find” is very large.