ehhhhh... this is one I still struggle with. I could absolutely debate both sides on this one. I'll try to be super succinct.
Pros: Why prolong death (these people are usually not living, they just aren't dead, even though they are in the process of death)?, Healthcare costs in last 6months of life often/usually exceed the entire cost of healthcare dollars of the rest of their life, patient autonomy
Cons: What Joe said, insurance companies*, the fact that if we are concerned someone may suicide on their own, we can legally keep them locked in a hospital indefinitely (eventually it has to go to court depending on state though) to keep them from killing themselves, doctors reconciling with "Primum non nocere"
*= Doc I worked with has had 2 separate occasions in the past year where the patient went through the authorization process for a curative (not palliative) treatment, and the insurance companies told him that "We will not pay for this procedure, but we will pay for assisted suicide, if that is what you guys want to do." I am not ok with a bunch of non-physicians pressuring people into killing themselves without almost any knowledge of their situation.
I could expound upon any of these if anyone wants. But I know you guys are probably thinking "shut the hell up already" so I will do you a solid and just not for now.