Please don't come at me for this lol

Here's my opinion, it is definitely gender inequality but in that situation, it is acceptable. Not all women learn combat or how fight and defend themselves, it's only natural for them to say that they to say that the girl would be useless in that situation. The way they worded can't be any better any that, sometime you have to be harsh so that they understand that running away is the best option, letting them stay will only be a burden. Telling them off nicely will only make them reluctant to run away.
If you were to put yourself in that situation, you need a reality check to know that every second counts, they are buying you time for u to run and are you just gonna waste their effort by staying behind and help, knowing that you're useless and a burden you don't run away ?
And yeah, the translation maybe different from the others (＊￣︶￣＊)

Yeah, that does make sense. On the RAWS that I read it from it literally translated to 'you are useless because you are a woman' , I ment that it could've been put better as it does not say in that situation but all the time. But I also defenitly agree with you :)

(°ﾛ°٥) damn, I just looked back at what I wrote, I could hardly understand even my own writing. I curse you Autocorrect(ノﾟДﾟ)

Good thing the fan translation didn't translate it like that. Like, of course, it was implied that part of the reason was because she's a girl. But it can also be interpreted as she's literally the one they have to keep safe at all cost.