But it makes a huge difference in image quality compared to digiscoping with a smartphone (or even the same camera with an adapter). See these images[1] taken with a smartphone + telescope, camera + telescope, and camera + telephoto lens. The telescope has more reach, but substantially worse image quality and requires a tripod. The last shot handheld is the first day I got the lens, I've gotten much better with practice.
Even when I have my camera, I've got a 200-600mm lens on it for the vast majority of the time. My phone has a 14mm equivalent focal length, so if there's a pretty landscape I'm just going to use my phone. The widest lens for the camera I even own only goes out to 28mm, so even swapping lenses doesn't get me as wide an angle as my phone can get. As a bird photographer I have no intention of ever getting dedicated landscape lenses.