1.- Once I understood how to do it properly, can do it daily.
2.- That depends on the dream really, even now I have some that are really foggy, though with time and practice the normal is as clear as waking.
3.- A LD can be forgotten, so if you don't have recall chances are you will forget them. Though you don't really need a DJ in order to boost your recall, there are other things and just the simple intent can help with it.
4.- One, for WILD SP is not needed. Two, the HH hallucinations of SP can be controlled as if it were a dream, so they don't have to be scary. Three, WILD just like DILD needs months if not years of trainings in order to get good at it, there is no holy grail. My DILDs have much better quality and durability than my WILDs too, but of course it depends on the person.
5.- If you don't want to train stuff, just attempt MILD before going to sleep. Otherwise a RC has its tricks and will be hard to do, unless you make it second nature, in which case it shouldn't matter.
6.- Because they don't know it by the name LDing and they don't know it is controllable, go ask someone if they ever had "A dream where you knew it was a dream?" or change name by nightmare, you will be surprised how many people do and think its cool, but they still don't know its possible to do this on a daily basis or to induce it. I would be in the same boat if not for a happy nightmare while a kid.