If you have ever had to verify a computer schedule when corrections had been done to the original rather than as an add on you would appreciate how onerous this could be
In the past I have transcribed for FreeBMD. Despite my best efforts I have on occasion made an error in transcription.
Some months later I might get an email from the corrections coordinator advising me of this error and requests that I review my transcription and amend it as appropriate.
At the next update the correct entry overrides the incorrect one.
So it's onerous. So what? What's the point in doing something if it's not done right?
Peter