He brings up good points, however, this statement is not factual:
"You might find some people who love their kit lenses, but letís be real, they are generally pure garbage. Kit lenses are almost always zoom lenses with an aperture between f/3.5Ė5.6 The images are not sharp, they donít take in enough light to expose without a mountain of noise, and paired with a crop-sensor camera, itís nearly impossible to get good bokeh with them in anything but perfect conditions."
While I agree with the fact that kit zooms are slow, my Nikon kit lenses exceeded my expectations. I tested both and was amazed. As a graphic designer, I've always been fussy about using high quality images... especially when printing brochures or posters.
I took the Nikon 70-300mm out (with my Nikon D5600) to a park for a sharpness test a few weeks ago and photographed birds at various focal lengths. They were all amazing. One shot in particular of a blue heron was taken at 300mm and it's tack sharp! I even photographed an osprey in flight and although the wind was blowing and I hand-held the camera, the image looks pretty amazing. Not perfect but sharper than I expected.
Stating that kit lenses are "pure garbage" is foolishness.