Since Leverkusen is currently chasing Bayern Munich, no other score is good for them except for a win. Bayern Munich, on the other hand, will compete in another difficult tournament, the Champions League, while they are on their way to the championship. They even played Leverkusen in the Champions League and continued on their way by winning both matches and eliminating them. Right now, Leverkusen will wait for Bayern Munich to lose points to other teams by winning every match. Although this possibility is possible, realistically, Bayern Munich will finish this year without losing points easily.
Bayer had just two matches in nearly a month against Inter in Champions League, by that time 4 more matches in Bundesliga would have been done, they need 5 wins if Bayer would win every single game and would still be champions so they could easily just throw away two games and play with the second team.
They are playing Augsburg, Borussia, Heindeheim and Mainz during this time they can afford to just go easy.
Apart from Mainz not any of the team are actually in need of points and Heindenheim will for certain not think the game with Bayern is one in which they have to give it all to survive the league.
Bayer has to deal with nearly the same teams in reverse order but can't even make a single mistake right now, what team is under more pressure?
Neah, Bayer fans are grasping at straws here!