McNuggets are Delicious so I don't care.

This is the mechanically separated chicken that makes our nuggets.

The entire chicken is pressed through a sieve (bones, guts, etc), and the end result is the pink, goop-like substance

There's more: because it's crawling with bacteria, it will be soaked in ammonia. Then, because it will taste gross, it will be reflavored artificially. Then, because it is weirdly pink, it will be dyed with artificial color.