Are you allergic to cellulose or amylose? Because those are the two molecules the plastic is made of. They're not making plastic out of gluten.
They already do this in many sweets by using sugar from wheat because it’s cheaper to produce but it makes many people with gluten allergy extremely ill.
They separate out the sugar but it’s contaminated.
A single molecule of gluten or nuts from cross contamination can make people with these allergies very ill.
Wrapping all food in our society with this stuff will lead to great suffering and danger for many. At least initially until the problem is acknowledged and fixed like in the cases of asbestos, tobacco etc