What purpose does a roll call vote serve then, other than to record the name and vote of each member?

Question

So what's the significance of a roll call vote, and why is it done?

Answer 1

So Hillary will know to whom to say "I told you so" in November.

Answer 2

It is done to ensure an accurate count. Sometimes it is too close to call on certain issues and for the record, a true assessment of the members intention must be filed.