Yes, money in the bank means you don't worry, that is by far the most impactful part of money. Spending more doesn't make you happier but having money so you don't have to worry is huge.
Ads try to tell you that you will be happier if you spend money, but if you learn to ignore those signals you can be perfectly happy on very little.
That and the not-fun part where you really don't have a clue if you are going to die when 60 or 65 or maybe 90. Then you also don't have a clue if you become a burden on your family for years - where that money would be used to take care for you - or you just don't wake up one day without means to use any of the savings.
Ads try to tell you that you will be happier if you spend money, but if you learn to ignore those signals you can be perfectly happy on very little.