Do they actually know how to make these chicken pieces? If so, why can't purdue or anyone else just simply grow chickens? I assume it would save them a fortune.
Because raising chickens (or really anything) if you only need 10% of it is insanely wasteful. Livestock is an incredibly huge waste of resources, one hamburger (1/3lb) takes 660 gallons of water.
If instead we can use synthetic meat (created in 'lab' then mass produced), we could completely cut out raising livestock, cut out livestock feed, cut out inhumane treatment of animals and at the exact same time, reduce the risk of eating animal products.
(And yes, there has been [semi-successful] research into synthetic meat. https://www.theguardian.com/science/2013/aug/05/synthetic-me...)