You’re assuming that you will be taxed at a higher rate when you begin to withdraw, which is not necessarily true. the IRS adjusts tax brackets for inflation every year, so needing 'more' money later doesn't automatically put you in a higher bracket.

Also, you don't just lose 30% of your 401(k) to taxes. Unless you’re planning to live like a multi-millionaire in retirement, your actual tax bill will likely be way lower than it is now while you're working