This is emphatically not an "entire population" question. This is an individual rights question. I don't know what safeguards exist in other countries to prevent "people who are unstable or overwhelmed personally" from "leaping to the extreme", but in Canada the rules are strict and multiple doctors have to sign off. You can read the MAiD eligibility criteria and the approval process here[0].

[0] https://www.canada.ca/en/health-canada/services/health-servi...