Well, if the photographers happen to be cheap, then that explains everything.
But really, not all couples really bother about actual day photography. The fact that so many of them have their budget between $0-$50 sums up a lot. They are not so interested in whether your pics turn out with great composition and exposure. Can see face, can already. They just want the table-to-table shots to see who got come that day to give ang-pao. There are many photographers who do exactly that, and they still have many satisfied customers.
Then again, any camera also can. But chao-chao also must have one external flash, lah.