I am far from expert on this and my analogy is going to be so rough it is laughable but mull it over for a second.
Imagine a clod of mud dried to the bumper of a car. This is your sugar. Now, for a given volume of water which method below would remove the most mud from the bumper?
1) Dunk the bumper in a vat of water, swish it around and remove to dry.
2) Slowly pour the vat of water in a localized stream over the clod of mud until the water is exhausted (catching the resulting stream in another container).
The argument considers the volume of water to be sufficient to dissolve and contain all of the mud should it come off the bumper. However, one method is going to get more of the mud off the bumper and into the water over the other method, for sure. Also, the possibility exists that both methods will get the same amount of mud off of the bumper.
Scientific enough for you?