Why does the UFC put fighters coming off losses on main events ?

There is no hype around the fights because there is no hype on the fighters,how do you expect to sell your main event fights when both fighters (not only one of them) are coming off losses and even on a losing streak ?
Lawler vs Woodley
Smith vs Gustafsson
RDA Vs Lee
Moicano vs Korean Zombie
Wonderboy vs Pettis
Masvidal vs Till
don't get me wrong,the fights may deliver but they aren't that important.none of them is gonna fight for a title again (maybe masvidal but that wasn't expected before...

Why does the UFC put fighters coming off losses on main events ?