It does look like no quarantine will be required as of July 5th for permanent residents and Canadian citizens. That's a big change.
https://www.canada.ca/en/public-hea...measures-for-travellers-entering-canada3.html
Beginning July 5, 2021 at 11:59 p.m. EDT, fully vaccinated travellers who are permitted to enter Canada will not be subject to the federal requirement to quarantine or take a COVID-19 test on day-8. In addition, fully vaccinated travellers arriving by air will not be required to stay at a government-authorized hotel.
So radio-canada and lapresse.ca were right, it includes (among other things) family members of Canadian citizens and PRs.