You want JPEG export. I know others that would like Photoshop PSD files. Yet others will want TIFF, or BMP or other esoteric formats. Should Inkscape support them all, or would it be better to export one or two formats and allow the user to use another application to convert to whatever they want?
You missed my point, Mark.  Moving to another application to do the conversion takes time.  I want to minimize the time I spend, not spend the extra time.

Why do you think JPG is superior to PNG for export?