This is quite transparently FUD. Clearly many people have a vested interest in commercial real estate occupancy being high and are pushing this narrative to inflate the value of their currently declining investments.
There are a lot of organizations that try remote with the same culture/mindset of in office. This is an error. Communication and iteration on remote work must be explicit, formalized and enforced.
New employee onboarding is challenging. It can be done, but it has to be very deliberate.
Any large team moves/merges are harder. Again, it can be done but there has to be a lot of deliberate work.
Interpersonal relationships are important for working. They are the lubricant that helps prevent communication friction. It used to be those relationships happened naturally in the office, but now they have to be deliberately nurtured. And that's part of WFH, not something ignore.
It's not that either narrative is right or wrong, they're just different.
WFH isn't the unequivocal One True Way. It's a way.