Storage in registers
This question illustrates a lack of understanding of fundamentals. What does moving mean!?
The RAM stores data in transistors. Do you want a little robot to pick up the specific transistors you want out of the RAM chip and deliver them to the CPU? I hope it is obvious why that is not possible.
Instead, an electronic circuit (which those transistors are part of) looks at whether those transistors are on or off. This causes an electrical signal to be sent to the CPU which updates some of its own transistors according to the electrical signal.
The question is akin to: &quot;Whenever I need my friend's phone number, I copy it from my brain into my phone. Why can't my brain send the original data instead of making a copy?&quot;