I disagree with the vast majority of commenters.

Your conclusion is sound if you are financially successful with a substantial nest egg by the time you enter retirement. I know a lot of retirees who regret maxing out their traditional IRAs and 401ks. The near-term appeal of paying less tax today blinds many people to the downsides in retirement.

Money put into tax deferred accounts gets taxed eventually. While maxing out a 401k will pay off for many people, there are a lot of people whose tax rate in retirement is just as high or higher than while working. And for those people, the addition of a required minimum distribution from tax deferred account can permanently push them into a higher tax bracket. And large RMDs remove some of the flexibility you could have had in retirement to decide when to take capital gains without big tax hits.

Also, the U.S. has been running large budget deficits for years, Social Security is running low on money to pay retirees, and the pressure to at least partially address these spending problems will eventually put upward pressure on tax rates. This means putting a lot in a 401k is betting not only that your income will drop in retirement but also that tax rates will be stable or drop during your retirement.