Georgia grand jury investigating Trump and 2020 election aftermath completes its work

I’m just a photographer with no legal background. But WTF do we need with a #specialgrandjury to tell the #prosecutors office it’s okay to convene a #commongrandjury so we can move ahead prosecuting enemies of our country. The only possible reasoning behind these special grand juries as far as I can see is covering their asses in the prosecutors offices with respect to their #politicalallies. Tell me I’m wrong