There is no way any of the FANG companies care about keeping their campuses occupied for the sole purpose of justifying their costs. If remote work resulted in happier employees and by extension more productive employees that trade-off would be a no-brainer. The real reason is they genuinely think in-person benefits outweigh remote benefits for most employees. The internal employee surveys show this to be the case. Most employees want the hybrid model. HN is a bubble.