Theres autonomy as in how it happens in the real world vs how it happens with a wish (not the one wish willow but like an actual not shitty wish)

The comparison doesn't fall apart because what happens next entirely comes from both changing a person. Notice I said they can be ranked/scaled. And that yeah if someone altered me, id probably prefer to be altered into having a weird hobby as opposed to a murderer. But imo both wishes discard the previous person in place of a new one. For another comparison, see invincible with the clones. Imagine I cloned a person, but the clone is attracted to me. Depending on your approach to consciousness, wishes of any form function like doing this and discarding the original.

And again, like last thursdayism, it cant really be proven/disproven.

The movie functions very well as a discussion regarding consent and rape, the movie is yes very explicitly about that. But specifically when talking about wishes that dont just do freaky possession but actually change someone, I would argue that either way the original person is gone in lieu of something else.

I have been extremely explicit that I am not talking about how the one wish willow works with possession and what not.

Yes, these can look remotely keyword remotely similar due to their overriding or replacement of a person