Now this is a little philosophical for a “great debate”, so it’s possible it may be moved to "Mundane stuff…"but…
Is the absence of bad luck the same thing as good luck?
Luck – good luck or bad luck – is just an imaginary construct in your mind. It’s used to explain things you don’t understand, either because you don’t know how to calculate probability, or because you want to assign relevance to random coincidence.
“Luck” is just the hardwired human tendancy to look for patterns in randomness.
Luck, good or bad, is shorthand for “something out of the ordinary”.
As such, the absence of bad luck is not good luck (and vice versa), since the absence of something out of the ordinary is not in itself out of the ordinary by definition.
No. Another person’s bad luck is the same thing as good luck… 
Divine favor, result of blessings of God, or if the person has given away those blessings to another god, resulting in ‘bad luck’ or sometimes called curses.
Yeah, I’m going with kanicbird’s interpretation. Reality is far to boring.
Depends on how you define ‘luck.’
I’d personally define it as the extent to which actual outcomes vary from reasonable expectations. By this definition, good and bad luck are quite real, and are both unavoidable. And in answer to the OP’s query, by this definition an absence of bad luck would constitute good luck, because you’d expect to have both over any reasonable interval of time.
This. As difficult as it may be to understand, with bazillions of events happening constantly, sometimes it “appears” as if it would be impossible for certain groupings of events to happen without external input.
The people who have won the lottery twice? Odds are in favor of it happening.
Luck = Preparation + Opportunity
That’s a nice motivational poster, but you can prepare and have all the opportunity in the world and still get hit by a bus crossing the street.
That formula only generates 3.9 lucianos per wishrub. If you need more, you’ll have to throw “Aggression” into the mix.
Some people use the term to assign random coincidence to relevance - my wife is good at this. 
Talking about a person we know - Laura found out they sold a machine shop that they had started for about $1.5 million dollars.
“He’s lucky.”
“What do you mean he’s lucky?”
“He got paid $1.5 million for his machine shop.”
“No, if he got paid $1.5 million for his machine shop and he didn’t have a machine shop, then he could be considered ‘lucky’. But he sold a twenty-year running business, so I don’t see much luck in that. It’s not like somebody randomly wrote him a check.”
So, yeah - it’s an imaginary construct in people’s minds which they define however they wish.
So if you live your whole life w/out getting into a serious accident, what is that? What if you never have a bad illness? Good luck? Or just not bad?
This comment reminds me of the Spanish guy who won the lottery, with the last number being 48. When asked how he got the correct last number, he replied: {paraphrased} “I dreamed of the number 7 for 7 straight nights. And 7 times 7 is 48!”
When I was in a terrible car wreck a lot of people told me I was lucky I wasn’t killed. It’s true, I was very close to death. But, I claim I was unlucky to have had a wreck at all. If I was lucky I would have gently bumped a beautiful, rich woman, somehow causing her to fall in love with me. Maybe you could claim she was unlucky in that case.
So, it’s all in our heads.
I’d say you’d be “fortunate”. But that’s just a description of the situation one is in, and not the process of how one got there.
Good luck is when we like the random crap that happens, bad luck is when we don’t.
That’s it. Luck is determined* ex post facto*.
But that’s my question; what if it’s what DOESN"T happen?