That’s true. Most pro designers now use pretty complex software. While it used to be preferable to source and import and or DWG and get vector linework, that’s not so easy when dealing with RVT, 12D , VX or C3D files …the PDF is more appropriate. Thankfully that’s format that’s not going away any time soon.
Hi res raster import with a scale tool…not rocket science.
Adding some tools to delete layers if the pdf uses those(titleblock, files and effects, dims, anots) or text, would be appropriate as well.