Better question: What if we actually punished perpetrators of threats and doxing with the existing laws we have against terroristic threats? Why do we treat this as some unstoppable force of nature when the vast majority of them come through traceable methods like mail or phone?

Then many complex commercial activities would be eliminated or have far higher transaction/insurance costs.

For example, loans. They would be priced against average risk, and low-risk individuals with privacy would pay the same risk premium as high-risk individuals.

This may be fine for individuals who voluntary give up privacy at chosen moments for chosen partners. It would be more complex and expensive to operate that general open brokerages.

A bunch of leeches would come out from the crevices acting like something that has only been around for a few decades is paramount to American democracy and capitalism where any regulations are akin to a struggle session against liberty, freedom, and justice.