Why should only the minorities that excel deserve a good life?

The guy just said “If you excel at something, you will be happy and less stressed” and you are seriously asking why only people that are happy deserve to be so? They didnt even claim that anything SHOULD be any particular way, they just said that the goal of being happy in the end is an aim worth persuing.

Let people be mediocre and instead we need to make life better for everyone.

You cant just magically make people healthier or less stressed or happier. If the other person had said “Health is a good reason why you should start working out” would you also respond with:

Why should only the minorities that excel [work out] deserve a good life?

?