For offense and clearing PoI rather than for defense like the shown one. Int is good for defending on a horde night, but when it comes to actually clearing a PoI and doing quests you don't really have many options besides to set up a bunker and go aggro stuff and lead it back to your sledges / turrets and then fight in front of them etc.
It does work, it just takes like 12 times longer than just sprinting through with a club and shotgun and clearing everything lol. I'll usually set up my bunker before big infestation rooms with lots of zombies, but int is at it's weakest when it comes to clearing small rooms that aren't worth setting up a bunker on. If you don't use an off attribute weapon, it will take you ages to clear even a small PoI, or you'll drain your entire iron supply using turrets that can chew through a thousand iron in 30 seconds
A t3 baton might actually make the baton useful / competitive too. I did a whole run focusing on using the stun baton and it's mods etc instead of just using a club / fire axe like I typically do , and boy howdy was it an asymmetrical playstyle! Those symmetical ones are all about just killing things that are dangerous to you and your friends, so it was a very experiencing experience to fight zombies with a wiffle ball bat on a sheet of ice.
I think I've got a video somewhere of me fighting one single non irradiated soldier for like 65 seconds while I chased him all over the house ragdoll sliding him while I beat on him with a maxxed out stun baton, until he finally died. I should have added some benny hill music to it
Hmm, I usually play Int pretty heavily, but never ever have I bothered with a stun baton(have tried, but meh). Fav is a baseball bat for melee, but I mostly clear POIs via stealth with a bow, rarely do they get the chance to even wake up, and I only use a gun when I rly rly need to(in POIs), saving most ammo for BMs. I use an AK mid-late game as a stand-in for both a sniper(4x scope and semi-auto mod) and a shotgun(close range OH @%$# moments). But of course I still love my turrets, junk and 9mm/shotty for base, though I mostly use them on horde nights, still take a junk with me all the time, and it does often come in handy clearing POIs.
I also tend to save as much 9mm and shotgun ammo as I can for their respective turrets, hence using a bow and a 7.62 gun. And It's hard NOT to use a Deagle when I finally find one, and usually have a good amount of ammo saved up for when that day comes, but it's a for-fun thing mostly, because Deagle.
Anyway, maybe if the stun baton, of any level, were useful I'd try again, and I have tried it out, but 98+% of the time I never bother. Baseball bats are too fun anyway. Point is I see your point, but in my case I resolve it by just never using a stun baton at all, even when heavily spec'd into Int. So maybe I would if they did buff it or add higher levels to it.
*disclaimer: I play a ton of R6 Seige(#2 on my "time played" list. 2.3k hours vs 3.2k hrs in 7DTD), which is a highly strategic interior stealth game against other human players, so stealth killing AI zeds is super easy-peasy for me.)