So Be It Meaning

(idiomatic) An indication of acceptance, especially of a situation which is not entirely favorable.

Example: 1851, Herman Melville, Moby Dick, ch. 99:
  From storm to storm! So be it, then. Born in throes, 't is fit that man should live in pains and die in pangs! So be it, then! Here's stout stuff for woe to work on. So be it, then.
2009 February 22, “ABC This Week with George Stephanopoulos”:
  It doesn't matter which party it is. If the people choose one, a Democrat, then so be it.