I agree with this though but 5% is comically low. I know you are just making a point but folks should be maxing out 401k to the point they can afford.

You are basically putting money away for retirement and lowering your taxable income. Less money paid for taxes and more money in account for retirement- sign me up.

Basically you get to keep more of your money. I would rather make 80k and have 20k going into 401k Vs making 90k and having 8k go into 401k. I like the thought of keeping as much of my money away from income taxes or at least pay the least amount I can due to finagling.