Weird in the sense that many folks seem to prefer local control and having an appointed superintendent seems to go in the exact opposite direction— with control being in the hands of someone who isn’t necessarily familiar with the needs of an individual school district.
The school superintendent is appointed (or really a more normal verb would be hired) by the school board. Most school boards in Mississippi are elected. A lot of municipal school districts do have the city council appoint the school board members.
SO at worst, you have somebody appointed by local elected representatives hiring your school district superintendent. Usually, you elect a board and the board hires the superintendent.
Which brings up another advantage of elected board members hiring the superintendent. If you have a lot of poverty and lack of education concentrated in one district, that area will basically elect one board member who will have one vote on the superintendent. If you are just doing a district wide election, then that one area with concentrated poverty may be a huge determinant of the school superintendent.