Wouldn't asking humans have this same kind of problem too?

If you asked a set of humans to generate a random distribution of heads or tails from coin flips, it wouldn't be similar to a real world distribution of coin flips either because we also have our own biases. [1]

[1] "Heads or tails?"--a reachability bias in binary choice" - https://pubmed.ncbi.nlm.nih.gov/24773285/

I don't think so. The author is expecting Jev to output the equivalent of "H: 50%, T:50%", not the equivalent of "TTHTTHTHH..."