Some argue mistakenly that there is no ethical difference between euthanasia and switching off life support or stopping futile medical treatment.
There is a vast difference.
When life support is switched off or treatment is stopped, the person dies from their underlying illness, from natural causes. When euthanasia is performed, a person dies from a lethal injection deliberately given to cause death.
To legalise voluntary euthanasia means making it legal for a doctor to intentionally kill a patient. That would be a shift in medical ethics that has been established for thousands of years.