I completely agree that a huge number of jobs can be done just as well wfh, some better wfh.
It is a shame these roles do not remain with this as an option as there are so many benefits.
For the company, they have a wider target audience for vacancies rather than just those within a commutable distance.
They can also be an option for people who may be incredible at the job, but due to sensory issues (just as an example), a big busy office does not suit. Or MSK or other health related issues prevent them from being office based.
Employees generally appreciate the work life balance too, and as save time commuting even work extra more frequently (our local data, I don't know anything wider, but I would assume similar).
For those in busy open plan offices, there is increased risk of illnesses.
Wfh is not suitable for all jobs. But for those it does suit, it gives those people who need to be home based a viable option, and indeed if there is no need to go in, it seems it is about power or lack of trust.
Good luck.