Problem is affordable programs.
Lathe isn't just 2 axis of a mill program but very specialised.

Unlike a mill that has a cutter where you know where the corner is at all times on a lathe the cutting point is behind the projected tip pint and has a radius. Normal turning is fine but when you come to follow a curve with a tip with a radius then the true toolpath is altering all the while and isn't as a lot of people thing just an offset from the contour.

Lathe programs start at 1K and move upwards, one exception is Dolphin who also do a nice lathe module and they do deals for hobby users.