That's just it though -- they do get to say what attacks land and do damage or get evaded if that's how they've set up the rp. That's the price you pay whenever you choose to rp on a site or game: if the owners/administration has decided that they want to set up rules on how you can and cannot rp, you have to follow their rules. Even if it seems stupid to you, if that's how they've set it up then that's how they've set it up.
Whenever I come across a site with rules that seem super restrictive or don't cater to how I rp, I choose to not rp there. It's the only thing you can do; there is no law stating that rp has to be done such and such way. It sucks that your FC is rping in a way that you don't like, but, well, you said it yourself that they're not generally a rp FC. They've decided that this is the best way to go about it, so all you can do is just watch the magic happen. Maybe it'll fail, maybe it won't.
Whenever I come across a site with rules that seem super restrictive or don't cater to how I rp, I choose to not rp there. It's the only thing you can do; there is no law stating that rp has to be done such and such way. It sucks that your FC is rping in a way that you don't like, but, well, you said it yourself that they're not generally a rp FC. They've decided that this is the best way to go about it, so all you can do is just watch the magic happen. Maybe it'll fail, maybe it won't.