Assumes everyone was in same office to start.
No one said home means slack/written comms.
Hours per day of ad-hocs & meetings in-person or zoom are similarly verbal.
If your company is globally / nationally distributed, you were on zooms anyway pre-pandemic, not a huge difference.
Extrovert vs introvert bias here as well.
If you are introverted & trying to get focussed work done, open floor plans full of extroverts and shoulder tapping is the reason most of your commits happen after 7pm when the office is empty or you are coding at home after-work.
Wife & I went into our offices for a partial week recently and had same experience - I got nothing done, spent hours on zoom anyway, am completely exhausted, and everyone just seemed to be there to socialize (hey lets get lunch! / hanging out by the coffee machine).
Ideas vs implementation thing here too.
Spitballing ideas is great, but actually having the time to implement them (not chopped up into 30min blocks between meetings & interruption) is another.