Why is Jewish American food so terrible when so many US Jews readily appreciate fine food?

During the time period the author seems to be referring to, American food was pretty abysmal all around. Tuna casserole, beans and weenies, ham loafs, ground beef skillet dinners, overcooked roasts, Swanson’s TV dinners, jello salads, etc. Once tastes began changing around the 80’s, Jewish as well as all American foods began improving drastically.