That's mostly focusing on broken RNG properties (i.e. static seed for a pseudo random generator, an outright bad algorithm, or bad entropy source for non-pseudo

That's mostly focusing on broken RNG properties (i.e. static seed for a pseudo random generator, an outright bad algorithm, or bad entropy source for non-pseudo RNG). They make random numbers predictable, thus your UUIDs become predictable. Cryptographic hashes are usually also dependent on RNGs having good properties (encryption has been broken due to bad RNGs too), but they are a bit more involved to figure out even if you know the input randomness, and are easier to invalidate (change the secret).