It might be better to burn to death in a ditch than to burn to death in the air. Uncontrolled fires can quickly turn nasty, and in such an emergency all bets are IMHO off.
Of course, the chances that such a fire and the extent of it can be communicated to the cockpit crew in the (often) short time between V1 and rotation, might be slim to none. And I also suppose that once rotation has commenced, you don't want to be a test pilot in an aircraft that size.