I would indeed call submissiveness a gift. But one from nature. Just like domincance is a gift of nature. It's a way of making life more interesting. It keeps things in balance.
A lot of books, articles, disserations and the lot, have been written about the nature of a Dom/sub relationship.
Like I said before, I feel that it's a Ying and Yang situation. The dominant party gets his/her power from the submission of the other, while the sub has a certain control because it is she/he who has the safe-word.
The sub sets the limits, while the Dom moves within those limits. Should limits be crossed, that's a thing of mutual agreement.
There is not such a thing as a relationship where there are no limits. First and foremost, because no one has a true understanding of what it entices.
Anyway, the debate is an endless one, as everything varies from the standpoint and POV you have, either as a sub or as a Dom.
JJ