the pre-brainwashed person had preferences about their future selves
That would qualify as
for instance, you might think that forcibly changing preferences is different from creating a being with unusual preferences
Also, it’s possible for people to have preferences about either their descendants, or about other sentient beings, just like they have preferences about their future selves. In fact, I would suggest that pretty much all the opposition to the idea is because people have preferences about their descendants or about other sentient beings. Again, it may be useful to spell out why you think those preferences merit less respect than preferences about one’s future self.
(Note that some answers to this require making assumptions about how to aggregate preferences, that are also serious points of disagreement. Fo instance, you might say that if you create a lot of slaves, the preferences of that large number should have a large weight. Such assumptions can also be questioned, and by most people, would be questioned.)
That would qualify as
Also, it’s possible for people to have preferences about either their descendants, or about other sentient beings, just like they have preferences about their future selves. In fact, I would suggest that pretty much all the opposition to the idea is because people have preferences about their descendants or about other sentient beings. Again, it may be useful to spell out why you think those preferences merit less respect than preferences about one’s future self.
(Note that some answers to this require making assumptions about how to aggregate preferences, that are also serious points of disagreement. Fo instance, you might say that if you create a lot of slaves, the preferences of that large number should have a large weight. Such assumptions can also be questioned, and by most people, would be questioned.)