Bhutan- I totally agree with you. I wanted to add that wedding is important too. For example, proper wedding etiquette dictates that no one but the bride should wear white at the wedding.
In addition, thank you cards for gifts should be sent no later than one month after the wedding. A mention of a gift registry is appropriate but asking for money is not. There are sites that allow a honeymoon registry in which the guests make contributions toward the honeymoon is deemed a bit tacky.
It is never acceptable to ask for money for yourself. It is the guest choice of what they to decide to give you. They may or may not use a gift registry, but you have to be gracious just the same because it is the person’s company that matters not the size of the gift.