No, he'd just shank more.
i was listening to some tennis commentary and heard something interesting
in an agassi sampras match- if sampras knew he was going to lose a point- instead of getting worn down by agassi he would blast it into the net, into the stands or hit a winner- but would not let agassi have the satisfaction of hitting a winner-
federer's topspin bh doesn't just lose points- it demoralises him, because nadal can just wear him down and hit a winner- giving nadal confidence- and then on the big points federer misses shots he doesn't miss against anyone else
you're right of course, a flat bh with fed would miss everything against nadal probably- although the stars might align once, and that one match, federer would triple bagel nadal