There are a two main of reasons. * People are worried about reprisals from their employer. * Lots of people have a greater connection to the name that they ha

There are a two main of reasons. * People are worried about reprisals from their employer. * Lots of people have a greater connection to the name that they have decided for themselves over one that was assigned to them at birth. This is very common with tech people. Hence why Google+ had the nymwars when it tried to enforce a wallet name policy.