There is a reason why NFL coaches scoff at PFF, i.e. they don't know what they are supposedly analyzing.
Very presumptive statement and completely 100% false. As more and more franchises expand their analytics departments, there is much more attention paid to PFF, ESPN Next Gen Stats, ProFootballStatistics advanced stats, and SharpFootballStatistics.
In fact many NFL teams have hired
directly from PFF, and recruited their talent to help build/design their own analytics teams in recent years, and implemented a lot of PFF ideas.
So when the casual fan disagrees with all their metrics, or even around here there are many that dismiss their ratings as garbage, its a very shallow and lazy thing to do. Do I personally agree with how PFF grades out every position? No I actually don't like the way they evaluate the secondary, but OL/DL, QB, WR, RB are all excellent resources to have IMO. The amount of data they look at on every single play regardless of the outcome allows for a more objective evaluation, versus just looking at the end result statistics.
Nowadays I would say majority of teams are utilizing some if not all of these sites, and/or have created their own analytics using similar principles. The era of the "non thinking coach" is fleeting as technology and access to information grows by the day.