It's no different than any other serve or product.
To demand and expect the raw is the same as:
Wedding Dress. You get the cloth, left over material, etc, so you can adjust it. As opposed to buying a finished product.
Food. You want the caterer to give you the raw ingredients, and you will put them together.
Music. You want he Dj to give out all the music.
If you didnt mix the music well,
If you didn't sew the material properly,
If you did cook and prepare the food well,
And someone complained, most wouldn't say "I did it all myself and saved money, that's why:
The food was uncooked,
The food was cold,
The dress didn't fit, etc...
After everyone gets the raw files, then they will demand to know what software, what hardware, can out write down the processing instructions, and teach them ow to color correct, etc...
The dressmaker doesn't provide the pattern, nor the source of the raw materials
The caterer doesn't provide the recipe, the food suppliers,
The Dj doesn't provide the musicians sheet music, arrangements, mastering process, etc..
The more professional someone is and the better the more they get paid of a simple reason "to assume risk"
Unless your independently wealthy who can afford to risk their reputation for what ever the do for a living by handing the client the raw materials?
You don't ask an attorney for "what leak books did you read, what paper do you use, what suit do you wear, what is your contact list?"
I'm not being rude, only showing that if you substitute the action, the risk, etc for wither one, it kind of makes since,