So, first, you are not "risk-averse." You are visible-risk-averse. You are scared of watching your investments drop in front of your eyes. There is, in fact, a much bigger risk that you are incurring every day: inflation risk. If you decide to live on the 2% interest your account generates, by the time you are in your 60s you'll probably have half your current buying power, so you'll be effectively living on $12-15K in today's money. But you're not scared of that, because you don't see it happening right before your eyes -- it is an invisible risk, not an in-your-face one. You are the quintessential frog in the pot, not noticing that the water temperature is rising slowly. And unfortunately, you won't notice it until you're probably too old/infirm to do much about it.
That said: You have $1.6M. I am going to assume that you continue to earn interest at exactly the same rate as inflation -- meaning that every year, you are spending down the equivalent of $25K in today's money. If that is the case, and you can keep your expenses to the equivalent of $25K in 2019 dollars, my calculator says that you can support yourself for 64 more years before you run out of money -- assuming you never work another day.
So, yeah, I'd say you're in a position to FIRE, even at your ridiculously conservative asset allocation, unless inflation really spikes (and interest rates don't keep up). At the very least, you have the wherewithal to stay where you are for as long as you are happy there. So congrats!
But do spend some of your free time figuring out how to put some money in the market without panicking at the first drop. Really, if you kept $500K in money markets/CDs, you'd have enough cash to cover 20 years! That's long enough to ride out any historical stock market drops -- but you'd also be earning a lot more than inflation with the rest of your money, which gives you much better long-term protection for what comes after those first 20 years.
[Also GenXer who lived through All The Economic Drama, including layoffs and homes that didn't sell, but who stayed invested and is FI, because despite it all, the stock market has rocked over the past @30 years]