There is a rational way to confront the reality of Mac Jones, so let’s do that before I encourage you to go completely bugf—k about what’s happening to your 49ers right now. The team’s franchise quarterback, Brock Purdy, is now expected to miss at least two weeks, and likely more, thanks to a case of the dreaded turf toe. But San Francisco is still 1-0, the season is barely out of the delivery room, and the early part of the schedule remains favorable. That last part rings especially true when you consider that the New Orleans Saints — the 49ers’...