This "what-if" needs to be examined in the context of understanding Lee's goals in undertaking the Pennsylvania campaign. In order to accomplish some of the most important ones (seek food and forage, upset northern morale, derange Union offensive action in Virginia), Lee would of necessity, need to keep his army's movements fluid and unpredictable. The campaign itself was predicated on being carried out as a raid, with swift jabs in and out of northern territory. Staking out the elevated defensive positions around Gettysburg might have been good policy if all Lee wanted to do was to wait for an inevitable Union assault (a plan of action that Longstreet advocated although not necessarily at that place). But the highly developed road networks that made Gettysburg desirable could also speed the arrival of Union forces which, rather than conduct a forlorn assault, could essentially surround and cutoff the ANV's fragile supply chain and leave that army withering on the vine. Time was not on Lee's side and he knew it.