We aren't incapable, we just laugh at the pyjaks who need to do so to win. MP has its own examples in the Rio box of shame and Hydra glitch spot, and pretty much anyone worth their salt trolls people who use them.
Anyway, at least platinum on MP is suitably difficult so I can sort of understand it. Why would you need to hide from the Banshees on Earth? The insanity ones are as weak as the ones on MP silver difficulty, and there's only ever two of them. I can kill 5 times that many in a single MP wave without having 3 rotating sets of cooldowns (squadmates), and they're a lot tougher.
Nah, you just scrubby. You need to learn tactics and strategy. There no OP character options IRL. So we only put them in the MP, where everyday is fantasy island. Pick your weakest enemy and favourite map. Then glitch the azz out of it.
*dips a Quarian in ryncol*
*bites its head off*