The hustle and grind.
It's fine to have a busy work day but for some positions, it's unreasonable to 'solve for the customer' for every customer each and every day. Some positions tout 'having the flexibility to control and manage your day' when it's simply not true with customers demanding more and more when you only have so much to give on a daily basis.
Some positions are better off than others; there's 'unbalance' between various services positions that brings one's fully booked, back-to-back day into question against someone else with 'nothing to do.' Something like that tends to decrease morale, doubt whatever fairness there is in the office, and isn't helpful to customers.