Unregulated brokers are not as strict especially during account opening documentation (they even accept expired means of ID) and this can cause people to want to open an account with them.
Some unregulated brokers may not even enforce money laundering controls thereby allowing traders fund their account from an account in a different name from their own. This also contributes to why people are drawn to unregulated brokers.
Some people may be aware of the risks of losing money to an unregulated broker but since they trade little capital they reckon they can take the loss.
However, the dangers of an unregulated broker are enormous, they can decide to close shop whenever they please, they can decide to reverse any profits you have made for no tangible reason, they can even open unauthorized trades on your account and make sure you lose.