It might. You would have to weigh the probability of actually picking up a serious illness and keeping it out of Canada against the inconvenience to passengers in buses and trains who were forced to wait periods of time while the quarantine officers were brought in, and then the cost of moving quarantine officers to the border crossing where somebody was coming in. So it's the feasibility of this.
It's feasible, but I'm not sure you're going to get any benefit from it. That is the point I was trying to make.