(Is it implied that I do begrudge them? If so where?
I just said people shouldn't do what they can't because there's a thing more important. Context of words sometimes altered, I just want clarification
)
Anyway I never take it because I have no time and energy to finish a thing without leaving another one unfinished. I actually have planned to join this year and have an idea of a story, but seeing possibilities of upcoming assignment is an eh no. Seems fun? Indeed. Wanna try it? not now 
Also with my view of trying NaNo is just personal goal which will not intended for contest, just for the sake of trying it out. I won't competitively join a contest when I see little possibility of winning, better safe my effort.