Dry fire has proven to be beneficial to far better marksman than I.
I dry fire for a number of reasons. It helps me practice trigger control, is fun, in the budget, allows me to become more intimately familiar with my firearms manual of arms, etc.
I incorporate drawing, presentation, grip, trigger control, sight alignment sight picture, stance, even reaction time. I "dry" practice magazine changes, why not practice pulling the trigger?
It should be said to not dry fire rimfire firearms, as the strike can peen the chamber.
It should also be said that dry fire should be done as safely as live fire. I leave live ammunition completely out of the room and still keep my firearm pointed towards a safe backstop.
The TV has served me well for target acquisition and reaction time. From the holster, I wait for the scene to change, or the camera to cut to another one, etc, then I perceive the first actor that appears as the threat, draw and fire. Repetition.
I don't use an expensive carry gun that has collector value in its original parts. As for wearing parts, I find the dry firing practice I do to be minimally invasive. Replacing springs should be a regular interval anyway. I don't have plastic sheeting on my couch either. Having said that, I am not the most financially responsible.
If I had the time and money, I would live fire every day. I don't, so I can't, so I dry fire.