In a 401k? Yes. But if you read the article:

Today, wealthy taxpayers can protect up to $452,500 per year in tax-advantaged accounts in a single year, saving up to $203,600 on their taxes. And they can keep their money in tax-advantaged accounts far longer.

There are many types of tax-advantaged accounts.

https://www.investopedia.com/terms/t/tax-advantaged.asp