It's not possible not to it you want to visit USA. If you don't, they'll reject your visa or deny entry. Thr only way is to use brand new cheap android before or after ( after is better ) and resell it once you go back. Most corporations do so
And the causes are probably broadly similar; lack of education about how to cook, lack of time to cook, lack of education on healthy food, too much food advertising, ultra-processed foods are too common, healthy foods are expensive....