I think the answer to
Elmo's question depends entirely on whether you read Éowyn's tale as a metaphor of a woman's life in general or as the story of one individual. I like to think that it was Éowyn's choice as an individual person and has nothing to do with what Tolkien thought a woman
should choose. There is a part of me, though, that is bound to read a more general meaning to her choice. It can be read as "Éowyn was never truly happy playing a man but learns at last her true nature, finds her way to a nice man and a womanly profession and becomes happy as soon as she learns her true and proper place in society". That, I think, is a slightly disturbing way of interpretation but it pops into my mind nevertheless every time I read the LotR.
Actually, I find it rather amusing that I should be upset by someone choosing to be a healer rather than a killer, choosing peace over war. If the one making that choice was a man I would go "Wow, that's so cool of him, great choice!" but since it's a woman my first thought is "Oh crap why does she have to submit to oppressive gender roles in order to become happy?" Thinking rationally, turning from a fighter to a healer should be just as cool done by a woman as it would be if done by a man, and yet somehow I don't feel like it. Now where's the equality in that?