Why use a getter and not a method?

I currently know how to do the following things:

@discobot start {name-of-tutorial}

Starts an interactive tutorial. {name-of-tutorial} can be one of: New User, advanced tutorial.

@discobot roll 2d6

:game_die: 3, 6

@discobot quote

:left_speech_bubble: Love is the flower you’ve got to let grow. — John Lennon

@discobot fortune

:crystal_ball: You may rely on it

it’s so helpful, thank you a lot.