READ SMALL PRINT: "this example assumes 7% returns"
LOL.. bank account offering 7% interest.. pfft
dare you to open excel and do a chart with REAL interest rates.
ill give you a hint at 0.05% interest Chris would invest $200k and get $200,390 bank balance after 40 years
Firstly, $200,000*(1.0005^40) = $204,039, so your maths is wrong.
Secondly, if your bank account is only offering 0.05%, you are getting ripped off big time. You can easily find accounts of 2-4% at the moment.
Thirdly, pension savings are not that same as bank accounts. The average pension fund last year returned 10%:
https://www.yourmoney.com/retirement/average-pension-fund-returned-10-2017/