As Bazile says, there would be no 'entertainment' if the groom chose what they bride wanted.
These reality shows thrive entirely on pre-set conflict situations - such as the holiday swap show. If you like lazing on the beach all day, turning slowly lobster-coloured, and then spend all night lying under a bar table unable to remember how to breathe, then the notion of a trekking holiday in the Amazon is hardly likely to appeal - and vice versa!
Yet under the imagined pretext that each family will 'educate' the other into a different style of holiday - taking attendant children who have no say along with them - they each endure two weeks in the vacation equivalent of the Ninth Circle Of Hell, and then fall out either then, or afterwards, or both.
You may guess that I would run a mile from this - free holidays or not!!