Although I do not disagree with that, I think I just stick to the old definition that I remember reading. Because, I actually did forget what the E stood for, and in one of Prof Hudson's article's he stated that was real estate, which made perfect sense to me.
FIRE is not about GDP numbers, this is personal, for rich people, such what are they going to invest in?
F is for finance which means asset classes like stocks and bonds.
I is for insurance, which is two things for rich people, as someone told me in the past, 1) the life insurance policy you keep paying into it and by law there has to be some rate of return IIRC, then their estate gets a bigger payout later, and 2) it is a way to pass on inheritance money.
RE is for real estate.
Notice that all three, are personal investment choices. They can do whatever they want, put their money in investments that best suits them.
Now if E stands for entertain, it surely could, it is not something we invest in, because that entertainment business probably covered in F which is finance, stock and bonds, and we can buy shares of some sports teams, like the Toronto Maple Leafs. For what that is worth.
The Leafs. Losers.