If you have a pile of cash you can lead a life of not much. But lottery winners and multimillionaires almost invariably seem to get bored by constant holidays, permanent no-destination travel, and other kinds of freewheeling.
Most people need a goal and a focus. And as soon as you have one you're going to frustrate yourself by definition, because you don't have the skills or the character to reach your goal immediately.
Which means work is involved. And that's going to suck in at least some ways at least some of the time, because work does - even if you're financially self-sufficient and are doing it for passion not money.