Re: DSLR v Camcorder
Both have their uses.
They filmed at least one full series of "House M.D." (Hugh Laurie) using Canon 5D MkII DSLRs. And they're old tech now.
TV film Crews don't use Camcorders either. They use pro quality video cameras that take interchangeable lenses that cost more than the average Joe Bloggs earn in a year. E.g. the Arri Alexa that will set you back about £90k for a decent setup.
But - comparing camcorders to DSLRs...
I have and use both Camcorder (Canon XA20) and DSLR (Nikon D800) professionally and for image quality and creative control the DSLR blows the Camcorder away. I like to control depth of field during a scene - using very wide apertures like F/1.4 (with ND filters to bring the shutters speed down the required 1/50 or 1/100" for UK mains sync.) I can't do that with a small sensor camcorder with a built in lens and max F2.8 (equates to about F/8 for DOF on that small sensor)
Camcorder = amateur footage with minimal creative control. Point & shoot and ease of use. Yes, they have a good zoom range.
DSLR = Creative control, superior image quality and low light performance. Harder to use for sure but the client doesn't much care how easy or hard it is.