It's cause like I said, alot of people have problem with their computer performance
They could still lower the resolution rather than playing at 1080p
But its most likely because since Ultimate ninja released they all played on Playstation
So most of em are more experienced in playing using joysticks rather than the keyboard
Same goes to Mortal Kombat
They released the komplete edition for PC just for the looks and sales
My cousin have a bad pc and he could play storm 3 full burst in windowed mode and low resolution with good frame rates