Why didn't Korosensei Watergate kill Kakashi? Speaking of Lynn's death, Kakashi has an unshirkable responsibility?

At the moment of Lin's death, the three views of bringing soil changed greatly. His purpose is not to let Watergate die, nor to let Kakashi die. His aim is to build an illusory and infinite world, so that everything can be realized and the forest can be resurrected. At that time, the "Eye of the Moon" plan was implemented from attacking Konoha and plundering Kyubi no Youko, but it was stopped by Watergate and failed. Moreover, Watergate was killed by Kyubi no Youko while protecting Naruto, not with soil. In order not to fall into the hands of the enemy, Lin rushed to Kakashi's Thousand Birds and died. Of course, it can't be said who is responsible. As long as the ninja world exists, such deaths happen every day. Think about Yahiko's death.