OK, so... Employees are compelled to go into the office, so they can have better in-person collaboration. They are also encouraged not to go to meetings (aka in-person collaboration sessions), so they can have more focus time.
I haven't seen the Insta offices, but I would bet they don't have walls. In which case, you know where the best focus time is to be had? Out of the office.
Yeah those open floors are so terrible. When i started late 90s I had my own office when as an intern. Everyone just had a little office. You could close the door if you needed to focus and you could open it if you needed a chat.
Then came the terrible time of the cubicles and then the open floor which was even more horrible.
I really hate tech work these days. Also because it's not really tech anymore. I don't get to do the nuts and bolts, I just have to tick boxes in the crap cloud admin panels that Microsoft gives us. I wish I could do something totally different.