We're all well known with mecha anime. Giant hulking robots flying through the air, fighting other giant robots or giant monsters. Thing is there's two kinds of mecha.
This
Aaaaaand this...
I think you guys can see the problem. It's the same thing people complain about with fantasy female armor, it's good to look at but extremely impractical. One stray bullet and you're dead and DEAD. I would understand if they had a shield but....why even risk it anyway? The second your shield goes down you're vulnerable! Unless you got plot armor I guess....Honestly this gave me a pretty sick idea. To combat against this OBVIOUS WEAKNESS, they take armor onto the human bits.
That's right....FLYING MECHA KNIGHTS/SAMURAI.