Almost everyone on my team comes in 2 or 3 times a week. We have some meetings, great (free) lunch, work together on some things, crack lots of jokes and get to informally chat about things you don't easily schedule a call for (how you're doing, how you feel things are going in the team, in the company, in life in general - the under current that doesn't get visible easily).
It of course helps that my commute is 25 minutes and that our office space is only for our team. There is a natural ebb and flow to when people get loud and active, and when we're burried in our screens cracking a problem, so you also get to be productive.
I do work from home as well. I really like that I have the freedom to balance wfh and wfo.
I find commuting both annoying and nice. It allows me to clear my head and switch over to the other mindset.
I didn't believe it and when I started going in to scope things out, I started believe it. I think what happens here is the author of each individual article will have had a specific set of experiences and that's the assumption they make for everyone. IME I don't see how the incidental conversations happen remotely, everyone is eager to get off calls, as there can be so many it becomes draining. So clearly me and my colleagues are missing some key ingredient that's probably obvious to everyone else.
I worked from home for years, on and off, so I can definitely compare.