No.
What LoveHurts means is the Wait, Sleep, Train, Observe options when you go to sleep in your cell, what pabo means is the Wait, Sleep, Talk, End options that come with the extended endings.
For the cell you know what to get and when to get it. If you observe on specific days you get a specific scene. And yes, some of those scenes can be missed if you do not choose the Observe Option on some days!
For the endings - Wait and Sleep makes no real difference. And talking will let you talk with your ending option, but afterwards the same scene will trigger like it will after you select Wait or Sleep!
Mixed feelings about this. On one hand I really like the randomness and the amount of scenes. Some endings have more scenes than other games have content. But if you want to see one scene in particular, for example the strapon scene in the talice ending, chances are slim to get it first try, because of the 15 other scenes. So it can get tiresome to get your desired scene!