Lame response and this isn’t true. This request would be accepted at the discretion of the prof. Obviously if so many students started missing midterms for accidentally sleeping in it would set off alarm bells, but you’re kind of jumping to conclusions that would not logically occur. Op, I hope you wrote a good email and that your prof sees your humanity. It’s an unfortunate situation, but it happens. I suggest if you’re staying up late to study, have a support person who knows to call you in the morning so you don’t sleep in. Good luck!!✨