This is the sad fact of professional athletics: If you (or your kid) want to make it to this level - doesn't matter the sport - the child's life must be 100% dedicated to this pursuit. No room to cultivate "backup" skills. So especially with full contact sports like professional football, the average professional career is 3 - 4 years. Most of these guys get drafted and don't finish their college degrees, make big bonuses and great salaries up front, and their career is over well before the age of 30. They likely have had a huge team of family/coaches on top of the management teams (agents, PR etc) helping them along the way - so the athlete isn't taking home nearly as much of those big bucks as everyone is lead to believe.
Hank may have nothing to show now for his hard work his entire life. Kendra likely planned her life around a Dan Marino-type thinking the money would come flooding in for 20 years, so now they are reduced to coming up with bafoonery storylines to promote their show. Transsexual cheating scandals that have spread out over 2 seasons of their basic cable reality show and a few offshoots - wife swap, marriage boot camp, UK shows...ugh. I don't even believe Hank actually cheated. I think Kendra is furious that the couple has no income other than the show, and let's face it - Kendra's way too old to tow the line as former Hef gf (that show ended years ago). She doesn't come across maternal enough to get into the mommy lifestyle guru club that a lot of her fellow reality show do. Her anger and bitterness toward Hank seem very real but she's projecting into a fake cheating scandal instead of opening up and saying "This wasn't how I planned it!"