USCIS merely follows the laws and rules. As with most things in the US, this is a Republican-created disaster.
In 2005 the Bush administration invented this system after the Omnibus Appropriations Act for Fiscal Year 2005. Which was, to put it mildly, a shitshow. They gave members a few hours to read over 3000 pages of new laws and 9 new bills. No one had any idea what they were voting for and parts of the law weren't even properly drafted; only 2 bills had ever even been debated. It took nearly a week after voting for the actual text to come out.