I totally agree that the flexibility of the COVID world won't work, neither will working from home full time be the chosen model of the majority.
But most of the organisations I work with (global financial services and insurance) have worked through things and chosen a hybrid model, or are about to choose a hybrid model albeit that it hasn't been announced yet and is still working its way through the approval/governance process.
I'm definitely not arguing that everyone should just be able to do whatever they like, wherever they like and whenever they like.
The ones I know are reducing office space where possible in the short term...most of their leases won't allow for that so they are using the interim period to get people used to working on a hybrid model, changing to hot desking with more collaborative co-working and bookable meeting spaces and want to put in place more upskilling of their management population around managing in a hybrid environment.
Then, when the leases come up they will reduce their office spaces.
They're also looking to offer more flexibility around which office people work from should they be closer to another regional office for example.