I don’t see what lying has to do with it. That would assume reality is conscious enough to lie. If reality has a subjective side, that would be hidden from us.
I suspect some people think that if determinism is not true then we have chaos or randomness, but it need not look any different from what we see now. Agents are limited in their freedom. With an indeterminate theory quantum mechanics was able to bring us technological advances. Indeterminism is not as bad as some fear it to be.