People in other countries probably don't understand just how powerful - and depended upon - the big telecoms are here in Canada. They have no presence outside the country - they are so bloated and inefficient they couldn't compete - but they are omnipresent here. There are lots of people who depend on Rogers for home Internet, home phone, mobile phone, TV, and home security, not to mention business services that cons…
In my neighborhood, I have one effective ISP, that is the cable company (who offers phone+internet+cable), the other is an old-school phone company who offers DSL (with bonded DSL, up to 12mbit). I thought that I could get a slow DSL connection to back up my cable, but no, there's some neighborhood line concentrator that means I can't get DSL at any speed.
So I really have only one ISP to "choose" from. (well, in theory I could get Starlink, but my area is still waitlisted, as is Verizon 5G home internet)