When you WFH you're not really an employee but a kind of consultant, who is paid by the company ALSO for yours home office...

Probably many companies hate WFH because of this: when people will realize the value of freedom at their home, their work can be seen as mere economical contract without tie, so people will be more precarious but so will be companies and that means we surpass the need of unionization by a kind of new market equilibrium.