No, I more meant that it's a huge hassle. For example, with the phone you can't compose very well because you have to wait for each frame to expose before you can make a correction. With the SLR viewfinder, you can just look and see what's going on. Then you have the issue of not being able to capture a specific area using a narrower lens (if your subject requires it), and just the experience is going to not be great.
I think with a phone in a tripod you can use an app like google sky to get it pointed at exactly what you want, and even use search functions and stuff.