No one was here

One thing about genmui shippers is that they're the biggest hypocrites ever. Muichiro and Nezuko don't interact sure, but go and ask them to list 3 times Genya and Muichiro interact in the whole manga and they can't do that, why? Because they have one interaction. A normal ass, quick interaction where they interact as normal comrades would. Nothing profound, nothing noteworthy, nothing that shows chemistry. So they're soul mates because they fight Kokushibo together and get cooked in the same fight? Lol yeah okay. Genya took a hit for Tanjiro against Upper Moon 4...where's the hype for that? Tanjiro saved Genya from getting his eyes taken out. Like, a lot of people consider gentan to be only genya ship that makes sense for a reason. Because there's something between them already established, they actually develop a bond on screen. If we're judging the validity of ships based off whether they're shown concern for the other or interact, Genya and Tanjiro are deeply in love I guess. Pretty much everyone in the ds corps are in a relationship with each other lol. Genmui shippers have this weird notion that Genya is somehow special to Muichiro when he really isn't vice versa. Muichiro would've shown concern over any other slayer if they got whooped by Kokushibo be fr, and Genya would've tried to help any other fellow demon slayer who was in danger too. It doesn't take much media literacy to know this

And mind you, Genya and Muichiro both appear in the swordsmith arc...never acknowledge each other's existence once. They didn't acknowledge each other until they were literally about to die. They don't have remotely any relationship development, depth, and established dynamic nothing. So it's mind-boggling why they act so high snd mighty like their shio is good and think they have room to talk about other ships, because what exactly does your ship have over others? What makes it special or stand out? Nothing. There are far better gay ships in kny with more interactions, potential, and a compelling dynamic. Genmui isn't special. If we're gonna go fanon for fanon ship, it looks even more empty and weak if you compare it to ships like gentan, even muitan. Who actually have interactions and development (regardless of said development was good or not).

Also Muichiro is not canonically gay lol. He has no confirmed sexuality nor was it ever hinted at. He's never shown interest or attraction to any character, so don't take them seriously. Its all headcanon. He hasn't shown interest in Nezuko yeah sure, but guess who he also never shows interest in? Guess who he also hardly interacts with. Some people in fandoms get so wrapped up in their own interpretations that they forget theirs isn't the one all be all and not everyone sees characters the same way. None of the canon characters have any established or confirmed sexuality, save for Suma but she's a side character so who really pays attention to her lol.