There will always be times when the moral and just thing to do is to break the law. Without privacy, you are not free to break those laws.

If you're happy living under a police state in meek compliance then you have nothing to hide. If you'd turn over Anne Frank to the authorities in a heartbeat then you have nothing to hide.

If you ever plan on doing the right thing by disobeying the authorities, at any point in the future, then you need privacy now. Later might be too late.

"Whether you've done anything wrong, what you disclose is up to you."

It is the correct position because privacy is a human right, just like the right to free speech or the right to a fair trial.

There are many source online that refute the "nothing to hide" argument, and they can go into quite some details. Suffice it to say, you have a right to privacy. If you wish for something to stay private (for example, to protect yourself from harm) you have that right. Whilst in most free societies it's seldom required, there may come a time when tyranny takes over. If you've already given up your right to privacy, you'll find few protections left. History has many example of tyrants that, given the data mining capabilities of today, would have probably caused even more harm and suffering.

For me the correct position is to recognise that the law isn't fixed and absolute, but dynamic (as interpreted through the courts) and evolving.

Without privacy (or with pervasive surveillance), we might never have achieved the critical mass required to overturn historical legislation regarding blasphemy, homosexuality, drug use, etc.

In other words, privacy provides the necessary sand-box for the evolution of law.

Right and wrong are subjective terms, plus perceptions of those terms will change.

"You do not get to decide what is wrong now, nor what may become wrong in the future. Unless you have a valid reason to invade my life, stay out."

In particular, please note: the concept of right or wrong is orthogonal to what may be legal or illegal. Both lines are constantly changing and re-evaluated by the society around us.