A person can be careful with their own visibility and still be well understood, because a person is not assessed in isolation. They are assessed through their connections.
Everyone is connected to others: family, associates, colleagues, the people they have done business with, the people they appear alongside. Each of those people has their own visibility, their own records, their own traces. And the pattern of the connections itself, who is linked to whom, is informative in a way that no single profile is.
This is why studying a person's network can reveal more than studying the person directly. A discreet individual at the centre of a well-documented set of relationships is still described, in detail, by that set. Their associates' disclosures become, in effect, disclosures about them. Their position in the network suggests their role, their interests, and the shape of their affairs, even where they have said nothing themselves.
The relationships also confirm things. A connection a person has not mentioned, but that is visible from the other side, becomes known. A link that exists in one record and is echoed in another is corroborated. The network does not only add information. It verifies it.
For a person of means this is significant, because their network is rarely small and rarely entirely private. Advisers, partners, family members, institutions: each connection is a thread, and threads can be followed in both directions.
The implication is that exposure cannot be assessed one person at a time. Someone who looks only at their own profile, and finds it sparse, may conclude they are not very visible. They may be entirely wrong. The honest assessment looks at the whole picture: the individual, the people around them, and the pattern that connects them, because that is how anyone serious would look.