14% longer in mice trails is more than a few weeks. Regardless of if it’s “desperate” or not, there’s worse ways to spend your time than searching for a way to live another decade.
Would seem more obtuse to me to assume that a gain of 14% for mice in a lab-situation would translate to a similar gain for humans in a real-life situation.
If they spent that extra time taking more care what and how much they eat and add some exercise, the effects would be much more pronounced (and they would be probably much happier too). But yeah sometimes even very smart folks end up in some analysis paralysis and tunnel vision.