You already switched everything to compare all values at age 65. Now its a lump vs monthly question.
The problem with monthly payments, you don't have access to the principal.
The problem with lump sum is all the risk is on you, market tanks you have no future income stream.
Would you take all the rest of your stash and buy a product that offers monthly payouts? Probably not, so why would you forgo a pay check of $34,000? Pretend you have a million dollar stash, would you put all of it into this product? You would get annual income guaranteed of $48k, but inflation would be your nemesis for the next 70 years (assuming 2% inflation, that $48,000 would look like $12,000 on your deathbed).
It doesn't matter where the money comes from, once its in your hands its all the same.