Most writers are better on paper than in person.
It’s no big surprise.
We have a lot of practice and we have a lot more time. Anxiety doesn’t step in to freeze your fingers, and you can proofread before you release the words. A writer’s internal editor can’t keep up with their mouth, but when it’s typed, you get a backspace key and a “cut” button.
You can sit back and see the shape of the words, adjust the rhythm, hone those similes and metaphors till they gleam with wit and wisdom.
No one can see your ratty bathrobe or your uncombed hair.
In person, you have to wear pants.
It’s not a stretch to say that writers live on paper (or computer screens) and are smaller, less impressive and altogether less real in the flesh.