You could not be more wrong, setting judgmentalism aside.
Not all terminal illnesses are without terrible pain. This is the purpose of morphine: to allow your loved one to pass without suffering and to make oneself ready for the passing into what’s inevitable.
You probably will not understand it until you give hospice yourself. Hopefully you can prepare yourself by volunteering at a facility where there are many awaiting by themselves.
You want to end your life? Fine, do it. But don't ask others to help you along. We've been down this slope with abortion where it was going to be safe and rare. We ended up with it being murderously barbaric in Holocaust type numbers.