(It's pretty depressing to see so many people defending conspiracy theories as a reasonable source of information.)
> You can only have evidence for things that have already happened.
Logically true and yet irrelevant. Why work so hard to defend conspiracy theories? Why is it so important to you?
> judging the intentions of bad actors and the likelihood that they'll act on those intentions
Based on evidence.
> Life is not a court of law however, and we as humans can use our common sense and intuition to discern what is right and wrong and plan accordingly.
Common sense and intuition are awful without evidence. That's why courts, engineering (metrics!), science, and anyone serious about anything, require it. Common sense and intuition produce witches and inject every bias we have. Intuition is well-demonstrated to be awful without expertise and evidence.