I don't think people should build the expectation where they require "success" to be happy - that only precludes them from being happy when they're unable to become "successful", for a variety of reasons outside of their control, for example, a car accident. It matters not whether everyone can enjoy "success", it only matters that everyone feel they have had the opportunity to be "successful" and they had a solid go at it.

With this perspective, "success" can be better than average, which is what it is a lot of the times - most lotto players thinks winning the lotto is "success", and winning the lotto is by definition to achieve a financial outcome that is above the average of all financial outcomes that can occur from playing the lotto.

If success is being better than average, then not everyone could enjoy it, or else success would just be the average.