Cons are that over 50% of your appointments will be 10 minutes long and your diary will be packed back to back from the start to the end of your day.
This is insufficient to help customers who have complex needs and leaves very little admin time for completing tasks that cannot be done during the appointment.
While managing a packed diary, you could be dealing mainly with people who aren't capable of moving into work in the near future*, you will be bombarded with journal messages from the customers, emails and teams messages from colleagues and managers which you need to stay on top of.
*Caveat, that is the demographic of my customers due to being in an urban area of high social deprivation.