system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does vibrato "sound good?"
gpt
Here are a few things i can think of

- vibrato hides some pitch problems. With a straight pitch, intonation is more obvious

- it gives the music more "texture", so theres more to listen for

- vibrato is variable (in speed, pitch distance, etc), which allows more expression without changing the notes of a piece.

- this is more theoretical, but i believe that music ultimately derives from the human voice/language, so adding vibrato may sound more natural/emotional than the "perfection" of straight tones.

Source: about to graduate with a music degree.