in real life kirkman never wanted the comic to end. He wanted the comic to be passed down to another writer and continue on pass him. but his artist did not really like working on the comic anymore and instead of continueing with the comic kirkman rushed an ending to the series. this creates a lot of issues where people just act stupid and plot points kirkman had in his mind for future arcs to be rushed to put to page to make sure everyone knows they did happen. This is seen with soooooo many plots in the end pages like darkwing just magically coming back alive with no explanation, invincibles rape baby growing up hating mark, etc. So yea thats kinda the reason.