It is possible, working only from records that are public and official, to reconstruct a remarkably complete account of a person's life. This is not a matter of secrets or of anything improper. It is a matter of method, applied patiently to material that anyone is entitled to consult.
The work begins with a fixed point: a name, a date, an address. From there it proceeds by connection. A property record gives an address and a date; the address leads to previous residences; the dates build a chronology. A corporate filing gives a role and a set of associates; the associates have their own records. An official register confirms a relationship; the relationship opens a new line of inquiry. Each record answers a question and raises the next one.
Assembled this way, the public record becomes a biography. It shows where a person has lived and when, what they have owned and held, who their family and associates are, the shape of their career, the pattern of their interests. None of the individual records was revealing. The account that emerges from joining them is.
What makes this effective is that official records are reliable and structured. They were created formally, for serious purposes, and they connect to one another in predictable ways. A researcher does not need a person to disclose anything. The institutions of ordinary life have, between them, already created the record.
For a person of means this is worth confronting directly, because the records that accompany wealth, property, holdings, directorships, are exactly the kind that reconstruct well.
The honest question is not whether any single record is sensitive. It is what the records, taken together and read by a competent hand, would say about a person's whole life. The only way to know is to have that reconstruction done deliberately, before it is done by someone else.