DY: Yes, but according to how most read the Rambam the Heter only applies to those who are/will become Rabbonim and teachers, not to Stam people who just want to sit and learn. Some extend the Rambam past that, but this Rambam has already been stretched thin enough.
Joseph: That is a misreading of the Rambam. He says that because he assumes that it would only take 3 hours of work a day to earn a living. If it would take more he would say to work more. Read the entire Halachah.