Indeed, and the slippery slope argument is in itself a troublesome rhetorical device. It’s popular, but it’s often characterized as a logical fallacy because of how easily and frequently it’s misused.

The dignity and comfort of a planned death ought to be thought about or judged on its own merit, not on dystopian possibilities.

Opposition to same-sex marriage often depends on slippery-slope arguments, leveraging fears about incest or polygamy. Yet marrying one’s sister is no more likely an outcome of same-sex marriage than forced euthanasia is a likely outcome of death with dignity.

I guess all I really mean to say is that we ought to judge things for what they are and not for what we fear they might bring about.