The concept of cable "lifters" has an interesting history. They were apparently first proposed by Enid Lumley, a reviewer for TAS. This link adds a little more to the story:
https://positive-feedback.com/audio-discourse/bunking-cable-lifters/
It's a relatively inexpensive tweak to try. If you hear a difference in your system, in your room, with your ears, then that's all that really matters.