I think its a cultural thing.
In some cultures, a wedding is a statement of where the parents are. My parents are not American born - we wanted to get married in Las Vegas with just close family and friends, do it up nice in the Venetian or Belagio (we would have paid for it), but my dad (who taught me LBYM principles) insisted we travel back to the old country and do the big wedding - he actually said - "This might be your wedding, but its for us!"
He paid big bucks, my mom had a blast living there a whole 6 months making the "arrangements", and I met a lot of people I did not know who I am related to! But my parents still talk about it.
(So we did both - we enjoyed the LV one better!)
Especially in the OP's future DIL's situation, if there is family from a different country coming in, this is the time to show them the "American" way, and in a way to show off the family the daughter is marrying into. It may not make sense but it might just be what is valued in that culture.
In some cultures, a wedding is a statement of where the parents are. My parents are not American born - we wanted to get married in Las Vegas with just close family and friends, do it up nice in the Venetian or Belagio (we would have paid for it), but my dad (who taught me LBYM principles) insisted we travel back to the old country and do the big wedding - he actually said - "This might be your wedding, but its for us!"
He paid big bucks, my mom had a blast living there a whole 6 months making the "arrangements", and I met a lot of people I did not know who I am related to! But my parents still talk about it.
(So we did both - we enjoyed the LV one better!)
Especially in the OP's future DIL's situation, if there is family from a different country coming in, this is the time to show them the "American" way, and in a way to show off the family the daughter is marrying into. It may not make sense but it might just be what is valued in that culture.