I know, it's all rule of cool married with maximum style.
Still doesn't make a modicum of sense given the setting though. That's like going on a hunting safari and trying to kill a water buffalo with a sword. Sure, it can work, but it's so ridiculously inappropriate and downright suicidal that no sane person would ever do that.
And them Huntsmen/Huntresses aren't psychologically instable, suicidal adrenaline-junkies, they do that as a profession. And even more than that, they do that to protect people, so if they get skewered, eaten, clawed up, ripped apart, etc. pp. they didn't just recklessly and nonsensically endanger themselves, they also endanger anyone in the immediate vicinity who's now the next target of whichever present Grimm after that idiotic Huntsman/Huntress died.
Might even be that's the point the Grimm are to represent within the RWBYverse, they'd be the physical consequence of recklessness/idiocy. And they aren't attracted to negativity, but stupidity.
I mean, there can really be only one explanation as to why Grimm are still an issue at the time RWBY is set in within its world when even a shleb like Jaune with little formal training and ostensibly mundane weapons like a sword and shield can kill Ursae on his own (as seen on Breach, Forever Fall Ursa doesn't count). You'd think that if that's a thing, any sensibly trained and organized force like an army (and let's not forget, they have an army, with giant airships, humongous mecha and all that hightech shebong, so that concept of organized armed forces isn't alien to them) could EASILY exterminate those Grimm creatures if they just put the effort in properly organizing and executing a campaign. So the obvious fact that ever since within the shows setting, Grimm have been present and still are can only attest that humans in the RWBYverse are utterly incapable of common sense if they hadn't already eradicated the Grimm a couple hundred or maybe even thousand years past.
It makes zero sense. Zilch, nada, BONKERS!!!
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In short, what you should take away from this wall-o-text:
Show doesn't make sense, don't think about rationally or you're gonna have a bad time.
I still love the show when I switch my brain off.
My official theory regarding the Grimm is they are the metaphysical concept of consequences born from idiocy made physical form, as if the world was yelling at humanity "STOP BEING STOOPID OR I'LL MURDER Y'ALL".