If it wasn't for us being biased by the surrounding circumstances I don't think people would have confused their voices. Their voices are not that similar. I probably personally know people with a voice as similar to SJ as Sky's. You probably do too.
The voice actress says the same: "I’ve never been compared to her by the people who do know me closely."
But then suddenly a story emerges and their voices are indistinguishable. All of these extra details shouldn't have even mattered.
If it sounds nothing like her, and there was no intent to make it sound like her, why would he tweet "The killer app of LLMs is Scarlett Johansson"?
Many people made the comparison right after it was released https://x.com/search?q=scarjo%20until%3A2024-05-14&src=typed... and https://x.com/search?q=johansson%20until%3A2024-05-14&src=ty...