Wedding Proposal in Indonesia

I'm so curious. How can someone propose to his girl when they've picked engagement date, or even wedding date? Some couple got engaged during their prewedding session. Some guys propose after they held an engagement ceremony. This story is even worse; a Thai socialite got proposed just two weeks before her wedding, months after they had prewedding photoshoot, engagement ceremony, and hand-deliver invitations to guests. LOL. Her reaction is unbelievable too; acting surprised and moved to tears. That's too ridiculous. Based on what I know (and believe), a marriage proposal is where one person in a relationship asks for the other's hand in marriage, by popping those famous question "Will you marry me?". If accepted, it marks the initiation of engagement, a mutual promise of later marriage. A proposal is intended to be a surprise! The answer could be a yes or a no or a "I can't answer it now I'm not ready yet". Acceptance of the proposal is not compulsory. A woman may decline a proposal and may not declare what the reasons are, yes? But in this case, the answer is already known -.- There's no doubt, nerves, sweat, anxiety of being turned down. Well, I guess these people doesn't know and doesn't need that essence of proposal.