I'm not saying the office is some perfect, joyous or highly social place or anything. I just think for me, it makes a big difference to have a place (different from my house) where people come together to work on common goals, and occasionally interact face-to-face while doing it.
Can you imagine feeling fine with more frequent WFH yourself, if something about the culture changed?
For example, could you otherwise get the vibe that people were engaged and wanted to be working together, even when it was on intermittent chat and videoconf?
(And if there were occasional in-person meetups, if only for more personalizing or focusing?)