This is one of those questions that IMHO 1/2 of the girls will want to, and 1/2 will not.
I am guessing that the ones that want to meet them have a one/all of these reasons...
They want more info about medical history, are so open about the process they want her to be poss involved just in case they think the child might be curious where the tiny bit of dna came from, or maybe they are themselves just curious what the woman actually is like so they can have traits to compare the child to?
Sure there will be more reasons added by another reply.
This is just me(and I will be tell child only) I do not want to meet her. I am thankful for the technology, and of course thankful to her for being a donor...but from everything I have read...why would I want to lament (yes I would)over yet another thing that will most likely add more stress to an already questionable future explaining this?
Good luck to you