I wouldn't assume they are THAT processed - I haven't seen them, but bear in mind they are a "frozen" product, and as such might be pretty untampered with.
The meat will be cooked. But it is still 100% chicken breast. So even if it was pre cooked, or chopped up in a food processor, its still chicken breast, and it will still end up chopped up by the time it reaches your stomach!
Its a different story if it says "at least 80% chicken". That might mean any and every part of the chicken, including foreskins and hock burns and god knows what else, and then 20% something else to make it into a "substance". That's a different story altogether.
Its convenience food at its worst, I know, but not MASSIVELY different to a panini that you get in starbucks - something pre-assembled with pre-cooked meat etc, that is then toasted to serving temperature. Some would say they are not very nice either but of course food is all down to personal taste.