I fully advocate for WFH regardless and to even supplement with an option like DeskPass for those that want to take a break from home. But a portion of those former office costs should go to the workers.
I agree that employers should pay for adequate equipment (desk, chair, additional monitors, a great camera and headset, not just the laptop). A reasonable sum of money for mortage/rent and utilities should also be considered.
Though be careful what you wish for. One of the advantages of home office is that commuting time is not paid (with the somewhat reasonable justification that people can freely pick where they live and it’s not the employer’s job to subsidize those living far away). I think if those at home get something for the additional rent/mortage and utility use then those commuting should also get something for their commute time and lost flexibility. So in the end that comes to me out in a wash and I’m generally fine with no one getting anything.
Some of the cost is always borne by the workers. And most people don't realize just how expensive wear and tear on a car is (or just owning one to get to work independent of wear and tear).
Personally, I'd take the wear and tear on the house over time lost commuting.
You would have a better point by arguing about energy consumption, there the difference might actually be significant. If you, e.g., need to run your air conditioning in hot summer.