No doubt, there's always some bad with the good. The counter is to ask about the proportions.
It's actually a sliding scale of badness, but for the sake of argument let's pop a marker on that imaginary badness line and call everything worse than our marker "bad" and everything better than it "good". Let's also assume such objective criteria exist. This is a lot of assumptions!
Now, assuming we got this far, is the "bad" 1% of the sum? Or 90%? 99%? Because we just don't know, I'm going to make another assumption and assume it's a tiny minority.
We still sell knives even though they can stab. Mostly though, knives do other knife things. And we have police and courts to deal with the bad uses.
It's actually a sliding scale of badness, but for the sake of argument let's pop a marker on that imaginary badness line and call everything worse than our marker "bad" and everything better than it "good". Let's also assume such objective criteria exist. This is a lot of assumptions!
Now, assuming we got this far, is the "bad" 1% of the sum? Or 90%? 99%? Because we just don't know, I'm going to make another assumption and assume it's a tiny minority.
We still sell knives even though they can stab. Mostly though, knives do other knife things. And we have police and courts to deal with the bad uses.