My DH has a pension, and as he is R (RE as compared to the usual target of 65, though he didn't retire until he qualified for his full pension benefits) and our state (it is a public pension) is one of the few rated as reasonably secure, I treat it as an annuity and use those online websites to ballpark what something similar would cost, though I always underestimate its as I never include the facts that (a) I have 100% survivorship and (b) it includes health insurance for him, and access to the group plan with subsidized premiums for me and DS.
And yes, as a result, we keep virtually everything else we have invested (except our Efund) in stocks.
Of course over time the value of the "annuity" (pension) is going down, and the stocks are going up, and we are getting older. So eventually that will shift. But for now we've still got about a 60/40 split even for the reduced estimated value of the "annuity."