Shanks was a relentless competitor. It's understandable she would retire rather than manage her ongoing hip injury rehabilitation to go to Glasgow for the sake of adding another line to her CV. She wanted to win. The post-Olympic blog on her website reflects that uncompromising attitude.
"Unfortunately, I can't miraculously make my disappointment of not winning a medal disappear. When you work so hard for something and then fail to make it a reality it leaves you empty and pondering. But that's the nature of the Olympics... in that cut-throat environment you have to put performances in perspective, otherwise it would eat you up and kill you."
BikeNZ didn't help matters when in April 2013, the Herald on Sunday revealed the women's component of the national track cycling team was not scheduled to compete at another major event until the Commonwealth Games in July 2014 - despite BikeNZ being allocated $3.9 million in high performance funding for the year with similar amounts forecast longer term.
BikeNZ was hindered by the UCI's restrictive rules which required teams to send athletes to all three World Cup events to qualify for the world championships. Previously two were enough. That put a strain on travel budgets.
At the time Shanks acknowledged it was a setback: "It will be bloody hard not going to the world championships for two straight years. We were disappointed with our London result but I still felt we were gaining momentum in an event which other countries are throwing money at. A number of other countries will get the jump on us.
"Fortunately the squad can still focus on a domestic programme. That enables you to get a lot of data off the bike but the lack of international competition is worrying. It is hard to maintain the motivation to train if you are not going to race the best in the world."
So it has proved, but hopefully Shanks will not be lost to the sport or the Olympic movement. She would be a forthright proponent about what it takes to achieve at the highest level. The only thing she's missing, through no fault of her own, is an Olympic medal around her neck.