I guess you didn't read the post. The primary purpose of a tax deferred account is to reduce taxes. From the post:
"As a result, one of the things you can't do with your RMD is to move it into a different tax-deferred account. Even though you are taking a distribution and paying the income tax, you are moving it into a Roth account, which is another form of tax deferral. You can't do that."
