Some people don't seem to mind not really tracking their spending down to an extremely granular level (ie everything) because they make so much money that small outgoings on their bank account are worthless, or they have to dedicate their time to their family and can't be bothered to track it.
That seems odd to me because they could be paying for things they don't need, or odd subscriptions they really could live without. Small subscription services rely on you not noticing the "small" amounts, but many small items make a big item.
I think a spreadsheet to track everything is really helpful to ensure that you are only spending what you need to spend, particularly if you wish to simplify your lifestyle (work less!) and do your proposed lifestyle 2 (need less money to live).