Most modern weapons are manufactured primarily to effectively kill enemies while minimizing one's own casualties, which is why firearms typically boast immense power, high precision, and considerable range.
While magic is powerful to a certain extent, in a wizarding world where even spells capable of directly killing an opponent are classified as Unforgivable Curses and forbidden from being studied, pitting wizards against weaponry specifically engineered for slaughter seems a bit too "naive."
After all, with firearms, once you learn how to use them, you can take someone down from afar with a single shot. But with magic, by the time you manage to draw your wand, my magazine would already be emptied.
Chapter 171