Everyone is taught through the magic of Disney that you get a happy ending. Not several stabs at a happy ending - the 'kissing several frogs before you meet your prince' theory isn't even integral to this froggy-themed tale - but one Prince Charming you will meet and just know is the one for you. Obviously this has been ripped apart in recent years by the Shrek trilogy, Enchanted and every feminist critic that could grip a pen, but something about those original 'damsel seeks hero' Disneys has endured - they are still the favourites.
If you watch the progression of their features, they go from zero-irony schmaltz (Snow White, Sleeping Beauty) to fairytales with a fun twist (Aladdin, The Little Mermaid) and then distance themselves from the royal love story with animals, toys and monsters taking over from these prettier and luckier versions of us. I wonder how much of this shift came from audience and sales figures - the last human-based Disney before this one was the not wildly successful Hercules back in 1997. They then got a little siller with The Emperor's New Groove in 2000 (one of my personal cult favourites) and then the freakishness of humans in CGI basically drove us out their Noughties releases entirely.