Uh, no. That is not true in the slightest. If you can DRAW you will draw good in both. I dare ya, go and do what they do. Pretty much no one can.
Also, looked down upon is a total lie. Digital art is frowned upon by purists who cannot get over the fact you can use a computer to draw. A
There are no filters for anatomy, posing, shading, lighting, and oh dear god the abominations a lot of people do by trying to cheat with the filler and blur tool are truly appaling. Short story; it does not work if you do it.