No it isn't. You see that attitude around here every single day. It's become just short of prevalent from what I can see. Everybody wants to push this agenda that "all of success is luck" and frankly it's absurd.
Could be. And admittedly, the issue of whether or not free will is a real thing or not would affect a great many things. My position, at the moment, is that we can't be sure, and we seem to have at least the illusion of free will, so I chose to make the simplifying assumption that we do, indeed, have free will.
That said, is is hard to explain exactly how "free will" would work in a universe that seems to be mostly - if not wholly - deterministic.