It might feel paradoxal, but as there's little context on each other's private life in the first place, private talk stays limited and trite (basically close to grocery lane small talk)
For instance imagine having a call for reworking a service and the other side starts asking what you did during the weekend, which happens to be medical follow up for your kids on the spectrum. Either you start explaining all your life, or you just cut it down and deal with the purpose of the meeting.
There's of course a ton of personal preference, some people thrive in grocery lane talks. I just wouldn't expect most people to be so.
