It's more complicated than "freedom vs. loss of life" because any "protections" necessarily have costs and unexpected consequences. So what ends up happening is even more terrifying than a direct freedom vs. lives trade off would be in theory.
For example, if TSA being onerous convinces a significant number of people to drive for their medium distance trips instead of fly, more people will die because driving is more dangerous than flying.
Also, it's not exactly a 1-to-1 comparison, but for every 700,000 hours(ish) you force people to wait or delay their day in some fashion, you're causing an entire lifetime of inconvenience. It's better than taking an infant from its mother and shooting it, but it's still taking an entire lifetime of potential and destroying it through boredom and frustration.
I know I'm leaning pretty heavy on TSA examples here, but we've also seen they can't even reliably stop weapons from coming through security in predictable and repeatable ways. So, "we" decided that a trade off between security and freedom was prudent, we implemented that trade off, and then we found out we only received the downsides and none of the upsides.