Thank you for your question. I agree with you almost entirely. We know very well that farmers, for example, dairy farmers, are not public health experts. That is obvious. If we put the onerous task of managing the quarantine onto the backs of farmers, there will almost certainly be problems that could put public health at risk, which is unacceptable in my opinion.
Under section 91 of the Constitution, it is the federal government's job to quarantine travellers. If the federal government does not have the means to manage quarantines, it should at least do it with the provinces' help. It is, however, a federal responsibility under the Constitution.