Please explain these lines from The Rape of the Lock: "Oh hadst thou, cruel! Been content to seize hairs less in sight, or any hairs but these!"

These last two lines of Canto Four resemble a huge
rhetorical "WHY?" or "If only..." uttered plaintively in the wake of the serial
mock-disaster caused by the snipping of a lock of hair.  After the epic battle between
the sylph and fairy armies of Belinda and Lord Petrie, the bloodshed, the family feud,
and the "rape" of Belinda's appearance, these lines are cast up to further the satire of
Pope's poem.

None of this would have happened, if the piece
of hair had not been so noticeable.  If Belinda's beauty had not been altered, if her
appearance were not in peril, this whole catastrophe could have been avoided.  The
obvious irony here is that it should have been avoided anyway.  A small piece of hair
raised to such epic proportions illuminates the vanity and trivial pursuits of the
society.