What's the problem with letting them work part-time from home while they're rearing their newborn? Maybe show up at the office with their newborn once a week to

What's the problem with letting them work part-time from home while they're rearing their newborn? Maybe show up at the office with their newborn once a week to catch up in person. I don't get it. It's not like the work typically conducted at such foundations requires them to be in the office 100% of the time.