Own one place
Social profiles are rented. Reach changes, features disappear, and accounts get locked without warning or appeal.
A single page you control, with your own link, is the anchor everything else should point at.
Be findable by name
People who have met you will search your name. If nothing authoritative comes back, the impression you made in person quietly decays.
A clean, fast, properly titled page is usually enough to own that search.
Consistency beats volume
The same photo, the same short description and the same link everywhere is worth more than a presence on four extra platforms you never update.
Recognition is the goal, and recognition comes from repetition.