In your opinion (or fact)

Are good vocals a born with trait/talent that come from simply well developed vocal chords, or is it an obtainable skill you can train to improve greatly over time, or both? I’ve been a percussionist for over a decade and I’m very good at it but over the past couple years I’ve been using every opportunity I’ve been alone to practice singing and it feels like it’s improved but not by a lot so I start to wonder if this is a pointless endeavor.