Aside from these studies, which I would love to see (Got a link or two?), like the comfort of religion that so many need for getting through life, I can see a real comforting need to believe one has an actual say in what they think and do. So, although freewill is an illusion, the illusion does have a valuable purpose.
https://pdfs.semanticscholar.org/cc72/53b2b7e7f0d68f6f31b65cfea7879f2705ad.pdf
Yup. Many people simply don't have the strength to accept determinism, particularly when it undercuts the core of their religious belief.
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Your statement seems to imply that folks have a choice in what they believe.