Don't most reporters start out with obscure/niche stories so they can hone their writing styles on relatively "unimportant" or filler pieces? If machines do all

Don't most reporters start out with obscure/niche stories so they can hone their writing styles on relatively "unimportant" or filler pieces? If machines do all of that work, how do reporters develop the experience to be able to write an organized, in-depth important story?