Question about FUE yield

[bighair]

My understanding is that there is greater yield from FUT over FUE. However am I right in saying that is comparing a total FUT procedure vs. a total FUE procedure?

Surely if you combine them you could have a huge yield? What I mean is could you have a mega session FUT done. And then subsequent to that have FUE done using the remaining areas on the back of your head (above and below your scar) as your donor area?

The reason I ask is cause when I see people after an FUT done I cant help but think that there are loads of hair on the back of head that surely could be used in some other way (such as FUE)