If you are charging money, yes, yes, yes! If not, then it depends.

If you want to work playing music you better have some.

Does it matter if there is a good performance from a field recording of an obscure
folk song? I don't think so. It's a document, not a performance.

If you want to share a song that you've written, a performance puts it across better.

If you are in a workshop or developmental class, then you are not expected to be a great performer.

If you are just studying singing for its own sake and don't plan to appear publicly, then no.