Having more money in the bank/invested gives one more options and more time (ie, if I have enough saved to last me until the rest of my life I have opened many more doors through freeing up time, etc) - that money was gotten through work and sacrifice, but it buys me freedom.
While you're right, earning more money requires more time and sacrifice - possessing more money provides far greater utility than having spent it (which is simply opportunity cost, a choice unmade means there are more opportunities).
You cannot have one (saved wealth) without the other (servitude and sacrifices). There are exceptions, of course.
Money is money. Freedom is freedom. I think most people with life experience would tell you that they're more often than not poorly correlated.