It won't matter what we think, say, or suggest. Why? Because the executor of the will, aided by the probate judge, runs the show.
A beneficiary on an insurance policy or a checking account, savings account, or brokerage account doesn't SUPERSEDE a will.
Those hereinabove noted forms of conveying ownership upon the demise of the (or AN) account owner have nothing to do with how a testator chooses to disburse property upon her or his demise.
It would appear things are as you suggest, but your representation of beneficiaries of financial accounts superseding those named in a will is most inaccurate.
Furthermore, the laws of each and every state determine what a financial institution must do with the remains of any account upon the passing of an account holder, if others aren't granted "rights of survivorship" by virtue of being cosignatories on the named account(s).