Yes, but that's just some humans being uneducated about how the human brain works. It doesn't really say anything about the existence of free will. In fact, the

Yes, but that's just some humans being uneducated about how the human brain works. It doesn't really say anything about the existence of free will. In fact, the reason untrained humans are bad random number generators has little to do with the abilities of the human brain and more to do with how random distributions work. Untrained people just don't know, for example, that long streaks of heads and tails are actually quite likely in a sequence of random coin tosses. If they did know the likelihood, and they were tasked with writing down a sequence of random coin tosses, they would probably do a much better job. If you take this to the limit, a human could learn to compute a pseudorandom generator in their head (at least in theory, although it may be very slow going) or perhaps figure out an effective way to gather entropy from the environment and turn it into a truly random sequence.