Doctors here are overloaded with patients and there are people that don't have a family physician. They use those walkin clinics.
Doctors are overloaded everywhere, Anna, not just in rural areas. In Ontario there is a shortage of Family doctors almost everywhere. 15 or 20 years ago the shortage was restricted to mostly rural areas. The Golden Horseshoe (the area between Toronto and Niagara) has plenty of doctors. But the situation has changed dramatically in the past 10 to 15 years, many old doctors have retired and new Family Physicians have not taken their place.
In Ontario, any Family Physician could set up practice almost anywhere and have more than enough patients in about six months. My wife’s practice was full after six months, she stopped taking new patients. She hasn’t opened up her practice for years, now she only takes new patients if they are relatives of existing patients (and even then not always).
So as mentioned before, healthcare in Canada is fine, but only if you live in a city. That's hardly what I would call a good situation.
Again, that is the situation in most countries; Canada is not unique in that respect.