The statistics and comparisons don't make the actual crimes committed by NFL players any better or worse. As a group of citizens who have a lot of advantages ordinary folk don't, their statistics should be a lot lower - if considered at all.
There is obviously a problem with young men being paid more money than they are able to handle and feeling their position gives them immunity.
Even if the crimes are not related to games, these men are role models and held in high esteem by society, and particularly impressionable young people. They are well paid to compensate for the first world problems brought by fame and should be able to lead their lives in the way ordinary folk are expected to, and pay for their crimes.
I love sports and I love to see my teams winning. I am not willing to let that love override the law and overlook social drug use, drink driving or any other number of crimes that might not affect the outcome of games. If a player wants to achieve the standard of a professional in the NFL (or any other league/association), they should behave in a way that reflects their standing.
Just my opinion, but if you lower the expectation, then expect lower standards and a reflection of this across society. I would rather a losing season than a team that contains drug users, wife beaters, drink drivers, gambling addicts or other similar acts. The organisation I support should also be doing all they can to combat these problems, not just covering them up or acting to limit the financial cost.