I'm going to assume here that you aren't just a sociopath and are open to having your mind changed...
How does paid vacation or benefits like health insurance fit into your model of the business existing to make money? You almost certainly provide those kinds of perks to your employees even though paying somebody while they are sitting on a beach somewhere doesn't directly help the business.
Think of work flexibility as just another perk. It's something you do to attract and retain the best people and allow them to do their best work.
If it has it's across a population and says nothing about the individuals working for the boss above. It's still up to managers to, well, you know... manage.
They have to evaluate their employees and people who aren't doing well working remotely may require closer management, may lose their wfh benefits, or something else.
How does paid vacation or benefits like health insurance fit into your model of the business existing to make money? You almost certainly provide those kinds of perks to your employees even though paying somebody while they are sitting on a beach somewhere doesn't directly help the business.
Think of work flexibility as just another perk. It's something you do to attract and retain the best people and allow them to do their best work.