There is always the option to just stand in line, of course! If I were going as a solo adult or with other adult travel companions, I don't think I'd have a problem waiting an hour or more for an attraction that I really wanted to see. But for those of us with small kids (and maybe you're in that boat too, so you likely understand!), the idea of waiting in an endless line when it's very very hot makes me want to stab myself... so if there is even a glimmer of hope to possibly reduce a wait to like 15-30 minutes (I don't know what the typical wait with FP is, I'm just assuming there is still a short wait at least), and at a reasonable time of day, then we all want to grab on to that. So that's why people are feeling disappointed or obsessing about FPs. At least that's my situation.