I think most engineers can hack their way to .bashrc even if they don't know the exact differences between those files. And those that can't probably don't need to or can get someone to help them. I just don't see a huge problem out there that needs to be solved.

Why don't i like the solution? Well it breaks a well known standard which will confuse others: show me your bash_profile and bashrc...wait what they are the same?? Secondly it invokes the terror of symlinks and the spaghetti mess that often results.

Sort of a nice idea in theory but i would not do it in practice.