> highly randomized (you don’t get to choose Summer2024!)
Sure.
> designed to be stored offline somewhere as a break glass.
That's fair.
> The OTP is usually very long,
No, 10 digits is not very long, that's just 10^10 (about 2^33). The xkcd password ( https://xkcd.com/936/ ) is better than that. It's better than Summer2024 perhaps, but not all that much better.