It's not only that some pilots don't want to do an IMC. Lots of aircraft aren't suitable for it. PFA aircraft can't be flown in IMC (I think that's right), and loads of old and/or simple aircraft simply don't have the instrumentation. Once you have your PPL, you can decide what sort of flying you want to do, and for some people, a tailwheel conversion may be far more relevant than an IMC.
No, straight after a night rating you should not be flying over very dark countryside in poor vis, over the sea, or whatever. And straight after getting your PPL you probably shouldn't fly around the world, though it's legal! The fact that a licence or rating LEGALLY allows you to do something doesn't mean that it's sensible to do it. You might need more experience, or more qualifications, or both. Some schools make that clear...some don't allow channel crossings without an IMC, and having crossed the channel in marginal vis where the sky and sea looked pretty much the same, I can see why. If the school doesn't make it clear, pilots should know their own capabilities and limitations. It's called airmanship I believe.
