So, Izayuukan, you're willing to accept giant robots that weigh nearly a hundred tons and stand about twenty-ish meters tall and can move as gracefully and quickly as any well-trained human (or, for that matter, move at all), without breaking apart in midair, without tipping over, without overheating and melting the pilot to death; you're willing to accept a magical do-all particle that conveniently happens to set combat tactics back to those of WWII; but once they get to the biosensor and the dead people, it's "unforgivable," it's "bad storytelling." Everything else, the wacky particles and giant robots, can be forgiven...but not the biosensor.
Hate to break it to ya, but if any violation of the laws of physics at all precludes a show from being "realistic" in your book, then your book ain't gonna have any "real robots" in it. 'cuz, see, giant robots? They violate the laws of physics. They are walking violations of the laws of physics. That they can walk at all is, in fact, a violation of the laws of physics.
(Man, I read an awesome article on how giant robots would be physically unable to move and would wind up killing their pilots, but I can't remember what it was called. Anyone wanna help me out here? I'll give you a cookie!)
And lest I forget...
Besides, here we both are having signed up to an online forum which is all but dedicated to Mecha, and you wonder why I take Mecha seriously.
There's a difference between taking mecha anime seriously and taking it too
I suppose this bears mentioning for everybody, now that I think about it. I know that the rule here is that you aren't to just cut discussions off with "plot armor" or "it's what the writers wanted to do" or whatever, specifically when you're trying to talk about mecha and technology depicted in these shows. That rule still holds. But if "it's just plot armor" is one extreme of the spectrum, Izayuukan here represents the other
extreme, the extreme that takes it too
seriously and demands nothing but "realism" and then throws a tantrum when someone points out that it is
just a TV show and the dissonance sets in and then RAWWWWWR.
At some point you have to realize that you are just talking about a TV show. That's an unacceptable view for a scientist to take, but we're not talking about science here, we're talking about a TV show--made by humans, who are known to cut corners, to leave things out when they don't care or don't know, to ask you to suspend your disbelief. If you come to a point where you can find no explanation within the show or within real-world science for something, then you'd do well enough to just chalk it up to the writer's license.
Otherwise you throw tantrums and find yourself in a knot that makes absolutely no sense--like, say, just by way of example, suspending your disbelief of wacky magic particle-powered giant robots, but then claiming "unforgivable!" on the giant robot getting power from dead people.
Perspective. It's great.