I'm going to say that most of the jobs that can be WFH'ed have such poor definitions of "output" (not saying this is true for you, just in general) that no one has a WFH vs. In Office baseline of "productivity", for the same reason so many of these jobs don't have well-defined KPIs or other bonus/pay metrics.

Employers just don't know how to measure the output of employees who are not doing something very repeatable like building widgets or whatever. Even stuff where we have massive quantities of data, like teaching, it is extremely difficult to objectively evaluate quality, productivity, and so on.

J.Ja