I'm not sure knowing who Hondo is really matters much. I'd say the majority or riders barely know the characters or don't hold it against an attraction when they don't.
In the bigger picture, this isn't correct. Attraction visitors are emotionally connected to characters they know.
This is simply a fact of all storytelling, going back as far as our history of storytelling.
While it is possible for a writer to develop new characters, and give them meaning, most literature relies on archetypes.
The Greeks did it. The word "archetype' itself comes from Greek.
Shakespeare did it. Many (most?) of his plays are rewrites of existing stories and historical events.
Oral storytellers in pretty much every culture worldwide did it.
The original Star Wars trilogy and Disney's fairy tales absolutely rely on classic archetypes.
The Hero:
-unusual circumstances surrounding his birth
-often forced leave their family to live with others
-gets supernatural help
-must prove themselves during quest
-hero's death often accompanied by some kind of spiritual reward
The Female Warrior:
-often disguises herself as a man to achieve her goals
The Mother figure:
-often performs a selfless act to help the hero
-provides nurturing to other characters
-does not have to be old
-mother figure can go both ways in some twists: she doesn't always put hero's needs above her own
The Mentor:
-protect main character
-often the sidekick
-often provide humor
-often wise old man/woman, but not always
The Sidekick/Jester:
-absolute loyalty to the hero
The Scapegoat
The Villain
The Monster
We get emotionally invested in famous characters the more we know what to expect of them, but we still need the story to develop that connection.
Who is Hondo? If we don't know who he is, then we don't know how we are supposed to react to him. If we don't know how to react to him, then we aren't emotionally attached to him.
Rides like EE are successful because we know the yeti is a monster.