The vast majority of retired investors ignore bonds, all bonds. Not because they are risky; just the opposite is true. And not because they don’t pay enough; some actually beat the stock market.
No, the reason is they don’t know enough about them to make a rational choice.
The least understood investments are not options, stocks or even commodities: they are bonds. And this lack of bond knowledge is costing retired folks a lot of money in income, capital gains and losses in stocks they shouldn’t own.