No it IS filler and its grinds up more than beef, it grinds up eyes and other discarded industrial butcher parts too.The color that is soaked out of the filler with ammonia hydroxide is then re-added artificially.
Using eyes and other pieces of "offal" from the cow isn't allowed by FDA standards, heck because of CJD the entire nervous system of the cow can't be used.
LFTB isn't eyes or any other part of the cow. They're trimmings. Could it be trimmings scraped off the bone? Yes, but beef still exists on the bone and any connective tissue that's there is no big deal as that's still beef and connective tissues and such are still in whole pieces of meat. Colorings and such cannot be added, not without it being mentioned on product labeling. The pink stuff seen on TV was ground chicken, not ground beef or the LFTB/"pink slime." The stuff produced by the process comes out looking like ground beef.
As for the ammonia bit, I've heard it's exposed to it as a gas and it isn't a "bath" but I suppose it's possible for bath to be used as well. It's no matter, the ammonia helps to kill the bacteria that may have grown while the beef was held in the food-danger zone during the separation process. Ammonia is a natural chemical that exists in your body right now. Your kidneys do a pretty good job of processing it and excreting it through your urine. Ammonia is used in a number of food-making processes including the manufacturing of cheeses, yogurts and much more. It's a NATURAL chemical. It's in your body right now and it can deal with it.
You don't think its shady Trekker?
Shady? Not really. A
lot goes into the making of food that we're (and I) am not aware of but it's part of living in a society that demands food be safe from food borne illness and for a society with a high demand and need for food.
The LFTB process helps prevent the slaughtering of more cattle and keeps the cost of ground-beef in check since more highly regarded cuts can end up as a steak or roast instead of as hamburger. The LFTB helps recover meat that'd otherwise go to waste and makes ground beef production go further. I forget the exact numbers but without it a lot more cattle would need to be slaughtered and the price of ground beef (and likely whole cuts of beef) would go up quite bit. (I believe as much as a 20% rise in costs would be expected over time.)
Would I prefer my hamburger to be all straight-forward beef trim and not contain LFTB? Eh, maybe. But when I use hamburger I'm either making it into a spaghetti sauce, tacos, meatloaf or sometimes Hamburger Helper. Occasionally I use it to make a burger. Hamburger isn't exactly quality dining to begin with so it's no big deal to me where it comes from.
This LFTB process is all beef, muscle trimmings, and doesn't contain organ meat, offal, or any of that stuff.
While many Americans were vaguely aware of this process (how else would you get boneless meat in odd shapes...and products touted as quality meat claim to use no"fillers") the industry doesn't actually go out of its way to to tell people they are eating ammonia soaked meat that's re-colored and ground up from body parts we'd normally avoid. So because it's cheap and convenient it's ok?
Ammonia, again, is a natural chemical that is harmless to you, not to mention it has a boiling point of around -30F so it'll evaporate out of your food pretty quickly. As for boneless meat in "odd shapes" never seen it myself, you may be talking about something else entirely there, in true cuts I've also never heard of colorings being added. I don't deny it exists but if you shop in quality places you're probably in good hands.
LFTB/"pink slime" is nothing to worry about. There are shadier things going on out there in the world in other industries and I also would assume there are shady things going on in the food industry. LFTB isn't one of them.