Yes, it's all about how you use the information. Unless you don't have the information at all.
Cherry picking the Browns and Jags as a reason to ignore having an analytics team is ridiculous. 31 other teams have said that it's important enough to have at least one person on staff to help in that area, except us. Have the Titans won the Super Bowl every year since Vrabel became a coach? No? Well maybe they should be doing everything they can to find advantages over their opponents.
Do we know what PFF is providing? I had heard PFF say that they were working with every NFL team in some capacity now, but that doesn't necessarily mean analytics. They could easily just be providing them their grading and some other advanced stats on all the teams and players so the team can compare them against theirs, or a number of other services they do. But that doesn't mean they're using them to calculate odds of the Titans making it on a given down based on our past play calls, and what certain players tend to do on certain play calls, etc.