You have a point, but it would be hard to find a woman with any self-respect who didn't want her marriage to be very public and very official -- and not always with sinister motives, far from it.
One of the problems is that, no matter how discerning you may be, no matter how long the courtship or engagement, people just change. For example, you might marry a woman who is pure of heart but has one fatal flaw you failed to notice, eg. too easily influenced by her girlfriends. It might never occur to her to see you as a monster until these "friends" have put in countless hours convincing her that she's better off without you.
And then there's Iago...
Certainly.
Definately.. And of course these "friends" won't have to weary themselves working double and triple shifts.. Since they have the media, "education" and the court system to help them accomplish this task.