Unless you actually need to focus as close as a couple of inches a lot of the time, it is easy to put a close up lens on a regular lens. On the other hand. You cannot increase the lens speed itself, with any attachment and may not want to bring in additional lights. Starting with a normal lens and adding a macro lens, if needing extreme close focusing is probably what most do. The normal lens is usually less expensive also.
However, different strokes for different folks.