Digital BW, The Print

The reason canned profiles aren't necessary for BO or
for QTRgui is this: Some photographers still know how
to visualize and translate from color (the world
around us) to Black and White. A basic Ansel Adams
kind of idea. 

Also, some of us are not interested in large prints,
where Black Only dots might be seen ...my own testing
indicates that there is no perceptable difference
between B.O. and QTR results on a given paper EXCEPT
that QTRgui gives wonderful control over print tone
tone (cold to sepia) whereas Black Only simply
produces the kind of effect a given paper wants to
produce, emphasizing warm tones because the Epson OEM
pigment is somewhat warm. 

 B&W art and portrait photogs have worked simply, with
virtually no science, for generations, simply liking
their favorite paper...eg the look of Agfa Brovira or
Portriga Rapid (get either with QTRgui)or with the
look of of Kodak's portrait papers (either QTRgui OR 
Black-Only).

Many good photographers won't give two hoots either
way.

B.O. makes very nice B&W ... deep, true blacks on
every paper I've tried... some photographers will find
this their ultimate solution, and as usual some will
want more science and numbers than QTRgui can offer,
lusting for complexity... 

Me, I can go either way :-)