90-minute lunches, extended ping-pong table visits, "attending" meetings one doesn't contribute to are various ways to waste time at the office, but no one is eager to banish those. It appears it's only a problem when people slack at home; on the flip-side, no one is offering bonuses for those when they work until 7 or 8 pm because WFH can blur division between work and not-work life.
"Productivity" is just the flimsy fig leaf for RTO, a bunch of people have openly admitted that it's all about the "energy" they get from being around many people at the office, even of those people are slacking. It's not surprisingly that such personalities are overrepresented in leadership roles.