Hi Blake,
It is very common with larger (many Vertices) characters to Sculpt parts of the Mesh (like limbs) separately and then Join them together, although I’m not sure if they’d use Remesh for that…Boolean might be better…
Another thing, and that’s probably what you are talking about, you see often, is to quickly block out body, head, arms, legs with, for instance elongated Spheres and then Remesh to join them together.