The person that is blacked out is not unconscious. They just are not storing memories in order to remember the experience after the fact.
Can you see it? It is right in front of you that consciousness doesn't exist. It is right in your own example. It is a 21st century superstition and English language flaw. People cling to this idea the way people use to cling to the idea of a soul and some still do.
Like the soul, if you just get rid of the idea and word, nothing changes other than clarity in the language of what we are actually talking about instead of this ill-defined nonsense.
Do animals have a soul? It is the same question.
To come at it a different way. We can't be free of superstition and nonsense in 2024. There must be things we believe are true that simply aren't true and will look silly 300 years from now. What else do people believe in so admittedly in 2024 even though there is not just zero evidence for but we can't even define what we are talking about? It is prime suspect #1 to me when it comes to this category.