In fantasy world most people have to work hard and dont have time and intelligence and info to think about some philosophy themes or euthanasia etc.
There may be a lot more people today with the time to devote to a formal education, but that does not equate with being more intelligent (especially with many of today's universities). Not that I follow the topic closely, but a lot of what passes for philosophy today is pretty shallow compared to various historical sources (same with political debate, etc).
- Euthanasia - out of place. Rivellon is not land with modern hospitals when you could masivelly nourish patients for years.
What does that have to do with euthanasia? You can certainly have that debate if someone is being kept alive by artificial means with little chance of recovery and no means to communicate their wishes, but that is not the only case, or the most morally troublesome one.
Even if someone could do it by magic its very rare.
No, it isn't. Up until just before the events of Divine Divinity healers had access to the source, which could be used to easily heal grave wounds and sicknesses. We don't know when they first discovered the source, but even if it was after the time of Maxos, herbs to make healing potions are all over the place.
The point is that this is NOT some wide and common problem that would cause attention in the world.
There have been various times and cultures where babies with birth defects were put out of their misery and old people were expected to take a one way walk into the woods rather than become a burden on their families.
There doesn't need to be widespread political debate on a subject for it to come up in the game, merely one instance of different cultures or ideologies meeting.
Poor people accepts the circle of life and death.
Unlike rich people, who would never pressure or encourage a parent (etc) to kill themselves, or decide to withhold medical treatment, even if it meant they would receive an inheritance faster.