Underbeneath What??? I had to read that a couple of times because I couldn't quite believe it the first time. It seems that, to you:
a) A boss/ manager can call their "team" anything they like and may completely disregard team memebrs' wishes on anything, because they're in charge and set the "ambience". Yes, pissing your team off and disregarding their feelings on the most basic of things is the sign of a fantastic boss and makes for a fantastic team spirit, doesn't it? 
b) Only when you reached the lofty heights of management or bosshood yourself can you expect to be called by the name you choose - your own proper name. Hey, you're just not important enough until then and don't deserve the consideration.
And so, by extension:
c) If you never reach the lofty heights of manager, you may never be called by your preferred or proper name. But you're only an unimportant minion whose feelings don't count, so it doesn't matter.
Riiight, got it.
Maybe the OP likes her name, and likes to stand out, but that's not what I look for in a team member I manage. I like them to knuckle down and do the work, not piss about twirling in their tutus
So, using your own birth certificate name means you're trying to stand out? What?? How? Also you twirl in a tutu and don't work hard?
If you do, indeed, manage a team, under believe me, they hate you. Especially Debbie (or Deborah, as her DH, DPs, friends, and everyone else calls her).
You're stuck on managers and teams for some reason, but the OP never actually mentions a boss or team, just that someone introduced her presentation. Could have been anyone - equal level colleague, person from outside company to whom she was giving the presentation, the window cleaner - and the annoying habit of people amending others' names goes on in all situations, not just work.
You clearly DO judge people by their names, saying Alexandra sounds old fashioned and frumpy which was fucking rude and that full names are unfriendly, attention seeking devices, indicative of a slacker.