We can all do what must have been common in the past. Half remember/learn the words of a song then do our best to remember it at the appropriate occasion, sometimes getting confused as to what bits really belonged where and filling the rest in with new or borrowed.

We've continued the Folk process and constructed a variant, as was so evidently done with so many songs in the past.

Or we could take the precisely written/recorded and preserve it in aspic.

Ever tasted aspic on it's own?