Control sounds insidious, but there are a lot of ways in which being physically present plays into your psychology and manipulates you into working harder/later/ect. Thinking back to the last time I was in an office, usually when someone was fired/they announced layoffs, the anxiety in the space was palpable. You ended up working later voluntarily just because you were afraid of not being seen at your desk and they'd fire you next.

WFH allows me to be more rational with my employer. They can't scare me into working harder, and I'm not at all attached to the "office culture" if it suits me better to leave. I think a lot of the "soft power" of the employer-employee relationship comes from physical proximity, which is why you have middle managers not involved with the bottom line profitability rooting for BTO.