Canadian Politics Today

What makes you think attorneys don't challenge/dismiss jurors in the same fashion they do in the US?

https://www.cnn.com/2015/02/13/us/gallery/long-jury-selection/index.html

Jury selection in the trial of accused Boston Marathon bomber Dzhokhar Tsarnaev has taken longer than the judge had expected. For several weeks, prospective jurors have each taken a turn in the hot seat, being questioned by U.S. District Judge George A. O'Toole and attorneys for the prosecution and defense, as Tsarnaev, second from right in this court sketch, listened. But this case isn't the longest jury selection ever, by far. Although no one appears to keep official records on such matters, several infamous cases over the years have taken months to pick a jury, and longtime jury consultant Jo-Ellan Dimitrius recalls one jury selection that took the better part of a year.

The US system allows lawyers to grill potential jurors to look for bias they don't like. In the Canada system there are only peremptory challenges with some 'with cause' when a lawyer happens to know something about the juror. It is more efficient and it is not clear it produces worse juries than the US system.