I previously asked question(What can cause a wheel to fall off/hub to break?) as my wheel hub stud snapped and answers said all that needed doing was putting new studs and nuts in.
Mechanic said ok however he came back later saying he couldn't simply remove and place the new stud because in order for the stud to be removed the wheel bearing had to first be removed and this increased the labour.
Here are diagrams for the front left wheel hub assembly (https://www.hondapartsnow.com/Page_Product/SearchByName.aspx?Vin=&Make=Honda&Model=Civic&Year=1999&Submodel=&Filter=(bt=1%2c11;et=2%2c3)&Keywords=WHEEL+HUB), please click image ref 3.
Based on the diagram I don't see any reason why the bearing would first have to be removed to remove and then place new studs, but I'm no mechanic. Does the diagram suggest one might need to remove the bearing when replacing a broken stud or why might the mechanic have said that?
He also said ball joints needed to be cut but I'm not sure if its related to this issue but I thought I'll mention incase it is.