Because the monthly jobs report is a genuinely involved undertaking, and even monthly is pushing it. The Bureau of Labor Statistics builds the report from two large surveys, one of employers (the establishment survey) and one of households. Compiling and reconciling both takes the better part of a month. Run that machinery weekly and the output stops meaning much. Keep perspective on how rough even the monthly number is. First prints get revised, sometimes significantly, two or three months later as more complete data arrives. So a big headline reaction to a single month often gets partly unwound by later revisions. Take any one report with a grain of salt no matter how often it comes out. If you want a higher-frequency read on the labor market, a weekly series already exists: initial jobless claims, released every week, tracking new unemployment filings. It's noisier and narrower than the monthly report, but it's the closest thing to a weekly employment pulse. For anyone watching jobs data as a signal for rates or housing, the practical move is to weight the trend across several releases rather than trading on one number.