Kind of... you're technically right and and practically not. Nobody would describe a PRNG with cycle length of 8 as random. It's just reading numbers off of a list.
In the same section of uuid RFC: "See Section 4.5 for a discussion on random numbers.", and then: "Advice on generating cryptographic-quality random numbers can be found in RFC1750 [5].", so it's not like authors were unaware of the implications of trivial PRNG. It's just up to the implementation whether CSPRNG is required (user-visible security tokens), or just a PRNG (internal identifiers).
In the same section of uuid RFC: "See Section 4.5 for a discussion on random numbers.", and then: "Advice on generating cryptographic-quality random numbers can be found in RFC1750 [5].", so it's not like authors were unaware of the implications of trivial PRNG. It's just up to the implementation whether CSPRNG is required (user-visible security tokens), or just a PRNG (internal identifiers).