It is the only logical solution if Talbot and Lyon are both out and Husso already called up.
Jake has not played yet this year, so even if he has ample NHL experience, he would likely be less effective than a 3'x6' piece of plywood stood upright if pressed into a NHL game, so this gives him a opportunity to get some ice time in GR and be available.
Cossa has a golden opportunity and even if he does not shine right away (his MO) it should not tarnish him being pressed into service before he was deemed truly ready by the brass.
Husso as we know is one save away from LTIR himself, so some time with the wings may be a real blessing for Cossa this year if his cups of coffee are early and often.
Who knows, maybe he will surprise and show he is more than ready for duty.