If we were confident that the friction of immigration exceeds the allure of better wait times, then we can say with some confidence that better wait times simply aren't that important to people. Or at least, not as important as making more money, or retiring to a warm place, or hanging out where the action is.
If it doesn't rank next to those other reasons for immigration that all exceed the friction, I would suggest that people stop defending the US system by saying it's better than Canada's system. It isn't better enough. If you like it, fine. If you don't like it, fix what you don't like. But arguments that it's better than Canada should be accompanied by evidence that it exceeds what is actually an incredibly small amount of friction.
I mean, come on, it's not like you have to learn a new language or give up your love of Hockey to move from Canada to the US. If you have a university degree the whole thing is fairly painless.
p.s. On second reading, I see you talking about driving across the border for "Medical Tourism." To my understanding, this is inconvenient for seeing a GP or a specialist, and while some people consider it worthwhile for an MRI, it is not possible to buy into US medical insurance that would cover anything really expensive.
So effectively, medical tourism is equivalent to being completely uninsured in the USA. I don't think anyone argues with a straight face that being uninsured in the US is superior to being subject to the horrors of Canadian medical care. My understanding is that people argue that being insured in the US is more convenient than being a Canadian. If I thought that being insured in the US was superior to Canadian health care, I wouldn't reason that driving across the border for an MRI somehow gives me the best of both worlds, I'd want US insurance so that I could drive across the border for a heart transplant.
And for that, I'd have to move to the US and suffer the same slings and arrows of outrageous deniability fortune suffered by Ms Drabinsky when she tried to insure her family.