I think you mean one click and transfer all over to WikiTree.
When I first came to WikiTree I wondered if I could do this too.
I do use the Sourcer browser app, to save person data as Gary mentions. I find it very handy.
Also as Gary mentions many sources and people attached that are not accurate.
Now. I much prefer entering one profile at a time, after being a WikiTreer member for a few years now.
I almost always find either new information or an error on my part when I re research the individuals before I create a Biography. Which helps each individual the biography represents gets the attention they deserve.
The more I do this the more I learn about WikiTree which always reinforces to me the need for accurate and reliable sources.
I know this is NOT WHAT YOU WANT ME TO SAY!
And I do have 30 years of work and thousands of individuals in my database yet to add.
I prefer to enter ONE AT A TIME.
also
You could use GedCompare via a Gedcom upload. I find Gedcompare too cumbersome to use and every time I have attempted to try it, It would have been quicker for me to add individually.
Plus I have my own personal hatred of GedCompare.