Regarding 2 I think it's sometimes true - for example people don't like math, when they don't understand it. But when somehow they notice they're good at some branch of math - most starts to love it, cause they can beat challange. At least it worked that way for me for math and programming. Similiar story for team sports - I love basketball cause I was higher than most people in middle school so I was good at it.
Other thing is - when you need to do sth you love for living - it sometimes become a chore instead of passion. External vs internal motivation etc.
I think you're right, but I can't remember this ever happening to me. Maybe I just have to think harder.. Or maybe I enjoy learning so much that I don't care that I'm new at something. Or maybe I just avoid things I don't like..
I don't advocate any philosophical comments or endorse one. People, often in a blog, write stuff from their experience (or experiences of people around him) which might or might not apply to all or even a single individual author but worked well for the author (or around him). It's hard to generalize and hence, shouting that you don't fit into the 'general' or the 'natural' defined by somebody's premise is as baseless as generalizing it in the first place.
Other thing is - when you need to do sth you love for living - it sometimes become a chore instead of passion. External vs internal motivation etc.