Ethical problem?

I've just seen (it wasn't sent to me) a story of the life of - call him Col. X., a distant relative, who died in the middle of the last century.
It is I think accurate in most particulars and has taken a lot of research to produce.

Except that the person who wrote it, about a parent, has chosen to change the name and sex of the firstborn child, all the way through.
This person has had a 'sex change' - that was their choice; BUT has gone back to apparently change history.

You cannot change your birth certificate, and this will make future research impossible...I can't accept this!

Comments please?