My first issue along these lines was in 2011 when I told my nurse that Tesco chicken kievs spiked me something orrid. She said with all the confidence of a nurse that is was the bread crumbs in the coating that did it. I came home and made kievs with real chicken and bread crumbs and they did not spike. I told DN that I didn't think the chicken in the Tesco ones was chicken and she said that was nonsense.
Now I know more about things made with minced chicken and bulking flour I no longer touch those kievs, or dippers, or nuggets, or goujon etc ......
The BBC took a film crew to Kiev and filmed inside a chicken factory. To make kievs you first mince your chicken.
I haven't tested fish fingers but they may be to fish as kievs are to chicken. Anyway, what part of a fish is finger shaped?
I then had the courage to try other things and I discovered that providing the meat was identifiable then I didn't have a problem. Having bones in it is a big help and, indeed, original recipe KFC is fine
So many of the things sold in packets are just made of flour and sugar. It's amazing the appetising things you can make with flour and sugar, including gravy.