Being socially celebrated gets you all the things people teach you mean success as you're growing up: Money, probably a beautiful wife, the admiration of your peers. I agree with you that doesn't have to matter but I don't think you should underestimate how much that flies in the face of what most people have been taught matters most.
Which is why I am objecting against knee jerk labeling of people who resisted the temptation as "mediocre" and knee jerk celebration of those who did not resisted as "the others are mediocre anyway". It is tempting even without that.
The beautiful wife will get old as any other women, unless you exchange her ever few years. Being wife merely as a social status trophy is not the kind of relationship I would find attractive at all. I know that some girls are raised to believe that is what they are supposed to be, but that is another category of things I would rather avoid.
Maybe the average mediocre person is not just justifying their mediocre existence.
Maybe you are rationalizing bad acts bad on idea that being socially celebrated matters more then ethics and moral.