I agree with that, but just finished a full length book and want to tackle something a bit smaller before launching myself back into another one. Plus had some ideas simmering away for a while that I 50,000 words is just the right amount of space to tackle.
Also, some of us find it a bit difficult to motivate ourselves. Sometimes a bit of a kick up the bum (so to speak) is a good thing.
That's no excuse, and Richmond's not wrong though.
Not that I'm going to do this specifically, but I don't really have an idea for a full novel at the moment. I do have story ideas (more than ideas in some cases. I've written a few things but nearly not as much as I should) but they're mainly short stories* and comic scripts.
*Although they could end up as novels. These things have a tendency to grow.