Therefore anything in our lives, including our individuality, could be ascribed to being part of this grand plan. As the scripture from which this religion derives does not describe religion itself as being part of that plan, but that this deity created beings to be indidivuals and have 'free-will', it is reasonable to conclude that individuality is part of that plan - and religion, which suppresses individuality but promotes conformity - is not. Indeed, the very same scripture has religion being an invention of Man, not God.
I would say that your phrase "at the expense of their own personal belief" is inaccurate, at least part of the time. Yes, free will allows the ability to choose one's own belief, and that is what I see in churches: people choose to believe what the congregation believes. There is a type of conformity, but it is a result of like-minded people and like-minded actions. (I do know that there are charlatans who mislead in order to build their own empire, but not all religious leaders are like that.)
As for the 'invention of Man', keep in mind that some Christians view the relationship (a better word than 'religion') as being established by God.