Ok I have a question, and forgive me if I end up offending anyone by the end of this post. This is just tentative guesswork on my side.
So from my limited understanding of the concept of 'only Nikah and no Rukhsati', I believe that the bride's family insist on it (especially if the groom lives abroad), so that (Allah forbid), if kal ke dinn, something goes wrong, they could atleast get the girl married to someone else saying that it was only a Nikah case and nothing happened. Right? If this is the case (of course, other reasons are involved too), but this stance of the bride's side shows a 'lack of trust' in the groom. They are already making provisions for the future if the marriage does not work out.
Now if the two parties involved have room for doubting the other, then why would you expect CHC-ISB to accept the marriage as 100% genuine? To me, this makes sense when the VO sends out objection letters for cases like these.
Just my two cents...