because mechanically separated meat isn't actually muscle meat like you think 'other meat'. They remove most of the muscle meat, large fats, organs, and bones

because mechanically separated meat isn't actually muscle meat like you think 'other meat'. They remove most of the muscle meat, large fats, organs, and bones from a carcass, and then grind the carcass into a paste. The paste is then passed through a sieve under pressure. nutritionally it likely has nothing to do with 'meat' as you know it from a grocery store or butcher.