system
Given the following post, respond as if you're commenting on Reddit:
human
[TF2] What's the Canon explanation for why the Spy (and his team) can't travel through enemies and their buildings while they can?

Ask if you need me to reword. Idk if that's clear.
gpt
Presumably, the friendly spy knows the passwords and vernacular - he knows what to say to you to get you to move over just a bit so he can slip past, and he knows the ins and outs of the machinery so he can get by without nudging it. The enemy spy doesn't, however.

It's like meeting a tourist head-on on the sidewalk - you steer to the right, because you're a fucking human being who's been living here for decades, and they swerve left, because that's what their country does, or because they're just a fucking idiot visiting from a fly-over state, and now you're dancing face-to-face, and then you give him a blast from your backburner and he runs off and you finish him off because he's a fuckin' noob.