The big silicon valley companies don't need to care. They have deep pockets, and queues of kids round the block willing to work and live in cubicles for a chance to work with them joining every year.

The VCs don't care either, they want to keep their startups on a tight leash from Sand Hill Road.

For a bootstrapped startup that isn't tied to a Sand Hill VC, remote working is a viable option that gives them access to talent they wouldn't otherwise have.

You are correct - there is no push from anyone significant on this - this is one of the few things I think the Government should intervene in, heavily incentivised a work from home culture to the point where we can get rid of central business districts (in their current form) in every major city.

Other than very long term costs savings (and nobody thinks really long term), there's no money to be made from a big cultural shift that makes workers lives better.