Matter to who? In what sense? People die every single day, by the thousands. That has zero impact on me, it has zero impact on you. You might "care" about them in a humanitarian sense, but they don't occupy your mind on a constant basis.
Certain specific lives might matter - those who are actually dear to you. You want the world to be safe because death awaits all of us, and ideally you'd like it to be a distant concept rather than an everyday worry. If you care about lives so much, you should be supporting policies that preserve them.
213 people have been shot by the police across the United States in the first three months of 2021, 30 of whom were black, and an even smaller fraction was "unarmed", since that always seems to be a point of contention. In Chicago that's called "a weekend" - 875 people were shot dead in Cook County in 2020, 78% of whom were black - that's +/- 56 dead black people every single month, or 162 in the same time frame last year. Those deaths are preventable with proper policing, but that's not what you want - you want less policing instead. Who's caring about lives here, exactly? What should we worry about more, the few deaths by the hands of the police or the many by the hands of criminals? Both are bad, but one problem is more prescient than the other.
https://abc7chicago.com/chicago-shootings-2020-shooting-crime-stats-statistics/9250374/