That's exactly the implication. A lack of free will means everything we do is purely animalistic. We can still have laws for animals who present a danger to the public, but putting them down or any other animal is no worse than turning off a bright light that is shining in our eyes.
We can still have sophisticated social rules, up to and including fatal consequences. Morals are whatever we say they are and people, because they lack free will, are without morals. We'd only have our basic genetic programming, experiences and social conditioning. Those who fall outside social parameters can be eliminated as a waste time, space and food.
That said, I'm still solidly on the side that we have freedom to choose regardless of how limited that may be. Some more than others due to genetic malformity, mental illness, dementia, TBI, etc.
"Prayer offered in faith will restore the one who is sick, and the Lord will raise him up, and if he has committed sins, they will be forgiven him."
James 5:16
Just because I often strongly disagree with many JPP members whom I consider to be demented, suffering from a TBI or otherwise cognitively impaired doesn't mean I don't sympathize with their condition.
Even those who have studied behavioral psychology and experienced a career of observing the length, width and breadth of humanity should agree that not all human behavior can be accounted for as a matter of genetics, social conditioning or any other measurable factors.
Call it the X factor. I call it Free Will just like I use the word "God" as a place marker for the creation of the great unknown.