LOS ANGELES — The agony known as the offseason is over. After seven months, the National Football League is back. Thank God. If ever a nation needed football, we need football right now. This Narcotics For Leatherheads column has always tried to be all about football and only football. Football is an oasis away from politics, religion, and pandemics. But as the 2021 season begins, allow me to first express a deeply personal brief exception to this rule before getting on with our NFL 2021 Week 1 CDN Preview and Bettor’s Guide. It’s good to be alive… and ready for launching NFL 2021 Week 1 footb…