Do you feel that the 4th amendment should protect them? Or perhaps a new amendment should be written to protect them and abolish power of subpoena?
I’m slightly biased as I ask this. I feel that the mind is “sacred” in a sense, that it should be considered a fundamental human right for an individual to be able to preserve privacy over their internally held thoughts and memories, and that the ability of the court to force an individual to speak or disclose part of their mind is a wild overreach of power and an affront to the personal liberty of the innocent.
It’s a multi-edged sword. It also means someone could be forced to testify against a friend or loved one, and in a slightly removed example, my beliefs also apply to laws that allow individuals to be imprisoned for failing to provide a password to locked electronics, regardless of whether or not they actually remember it.
Maybe it would be a good middle ground to instead expand the privileges that allow members of a marriage to avoid testifying against one another, to include friends and family. The same reasoning applies, except that the state believes it can determine the strength and meaning of a relationship by its title and type alone.