It's easy to understand when most popular streaming services here are foreign owned and have created a terrible image for themselves by producing barely any tax revenue for the country.
Though, i'd argue it has nothing to do with the fact that they should be taxed appropriately in Canada. It replaces revenue from TV distribution that was appropriately taxed. Similar discussion to whether we should tax robots labour i think.
Also, I think countries have the right to promote their own culture. That might be hard to see from the POV of the country who's culture is slowly boulderizing that of the rest of the planet.