Management isn't just about who's working or not. There's a lot of what makes a successful team that requires careful consideration to replicate when everyone is remote. Yes, modern technology makes much of this easier, but it still requires effort to identify and address, whereas it is somewhat automatic at physical offices.
For example, "water cooler" conversations. In a physical office these happen because people are conditioned to make small talk. That is not the case virtually, as it's easy to spend an entire day in a chat room with a co-worker and never interact with them.
For example, "water cooler" conversations. In a physical office these happen because people are conditioned to make small talk. That is not the case virtually, as it's easy to spend an entire day in a chat room with a co-worker and never interact with them.