Perhaps we are splitting hairs here, Eddie, but to clarify:
The conversation was about flight in Canada and a US pilot flying GA in Canada must have a medical certificate. When I or most people talk about our medical, it is about the certificate or exam.
BasicMed is not a certificate; it is a qualification. If we the BasicMed route, we are “qualifying” through the program and are flying under BasicMed without an FAA medical certificate.
In order to legally fly a GA aircraft as PIC in Canada under current Transport Canada regulations, BasicMed is not recognized. We must have a medical certificate (and have it with us when flying in the US. I don’t know Canada’s reg on physical possession, but since this discussion is about flying “through” Canada, we’d need it on both ends. And, CBP could very well ask us for it upon arrival.).