Don’t make arguments on hypotheticals, I’m not humoring them lol.
Let’s ask Kakashi;
He was restraining himself due to the side effects of the jutsu.
It’s not.
exhausted Kakashi
Juubi Jinchuuriki with better perception and Sage sensing
Madara puts up a barrier instantly to stop one attack but is outspend the next—Gai’s speed is beyond Madara’s reactions. It’s not that complex.