Security, whether in the form of putting a lock on your door or protecting yourself against hackers, is only necessary if you're concerned that there are actors who are ready and willing to take advantage of you. In practical terms, everyone has adversaries, even if most are indiscriminate in whom they target.
Honest people suffer consequences if they do not take credible actions to protect themselves. In other words, even though it's wrong for someone to enter your unlocked door and steal from your home, it's unlikely that anyone will have sympathy for you either emotionally or economically. To prevent this from happening, honest people need to invest in security.
Like most forms insurance, you hope to never need to benefit from paying your premiums. But sadly, security costs for honest people are inevitable and unavoidable, just like taxes.