Khanb, bro you just started the journey so it's good you are excited and mentally confident about your care (I had mirror pictures as you at begging). Wait for 8-9 months by that time you will realize the reality.
Immigration officer as you said read your story like a book but if they read the story without a supporting story photo and find that from page 10 (Nikah) to straight page 13, 2 pages of Rukhsati/Valima are missing, they can ask for anything or can do any act on the file. They look and read all the stories (files) same way thus it doesn't matter whether it filled by an individual him/her self or filled by a lawyer/consultant. If all good everyone will get approved if not than he/she is in hot water and in that situation it's a good opportunity for lawyer/consultants to boost your shaken confidence (Arye fikr nahi nahi ye tu mere hath ka kamal hy) so that a chance of further putting a knife on individual pocket cannot be missed. For now we are all good, please visit the forum on a routine base and please keep us up-to-date and share your thoughts and experience after 9 months of your AOR date. At the end I would say Law is Law and it complies equally whether it's an individual or a lawyer/consultant.