Indeed. I would love for it to be true, but aside from opencascade^1 all the professional kernels are proprietary and not in the training set, so LLMs can't just regurgitate them.
^1: Which I really appreciate, but let's be real, it is far behind eg. parasolid.
FreeCAD is perfectly good user interface for opencascade. The problem is that as your geometry gets more complicated you start running into the kernel limitations.