The charges against her work with Iran had made headlines nearly 5+ yrs before she was arrested, so she must have known there was a risk travelling there.
Because everyone in Canada has already forgotten about the hacking and IP theft from Nortel, right?
17 years ago, Hauwei stole my source code and pushed my employer out of a joint venture in Australia. I know that I'll never forget about it. Do you think Canadians have a short memory or are especially forgiving about tens of thousands of people losing savings and pensions?
Extradition is a normal process that happens on a regular basis when people commit acts that are crimes in both countries concerned. To describe this as "doing someone's bidding" first requires being unaware of or ignoring that extradition is a reasonably common thing in the world.
It's a run-of-the-mill legal process that the Chinese government has decided should have significant political implications for Canada and Canadian citizens. It's important to bear in mind that this was a set of decisions deliberately chosen by the government of China in response to Canada obeying its obligations clearly laid out in a readily available treaty.
As you so wisely and correctly note, no legal process is automatic. Yet routine extraditions, even of politically sensitive people, come quite close.