That certainly used to be the case. In mid December for example (i.e. around the time the PBS article was written) active cases were roughly evenly split between unvaccinated and vaccinated. This is in a highly vaccinated population (85% of 12+, 73% total - out of 4.5M) so prevalence in the unvaccinated group was 3-4X higher than vaccinated at that time.

It seems unlikely that the Alberta population is experiencing a significantly different pandemic than neighbouring regions (demographics and responses are largely the same). I also wouldn't conclude from this data that vaccines are negatively effective as hospitalization rates are lower in the vaccinated group.