Can you find the word "all" in the original post? Because I sure can't. Because the person's point was pretty clearly that in other countries, their police forces are more frequently able to noon-fatally resolve dangerous situations. Pottery sure they wiener speaking in absolutes, so you're tilting at a windmill.
Like, if your argument is "well it's not 100% effective there so why bother" then I have some bad news for you about efficacy rates of literally anything in the real world.
He took a single incident involving a knife and then made some sweeping comment about how people aren't killed for having knives anywhere else. This is obviously fallacious reasoning to anyone with sense.
First, not all incidents involving knives end in death in the states.
Second, not all incidents involving knives end without deaths everywhere else.
Third, he presents no data whatsoever on the ratio of incidents involving knives or other weapons to those incidents resulting in death. The US undoubtedly has more of these. How many involve suspects being killed?