In what way is the wage gap a myth? You can argue that the wage gap isn't primarily due to absolute discrimination, but that the wage gap exists is an objective fact.
The ‘myth’ of the wage gap is that it’s an aggregate number. It is sometimes/often presented as women make 73% of the wages of men for doing the same work.
It isn’t true for the same work though. When you do apples to apples comparisons of equivalent positions the gap frequently closes to almost nothing.
The wage gap is better phrased as ‘women, on average, do jobs that pay only 73% as much as men’. Which, in my opinion, is actually a far worse and harder to solve problem. Paying women the same as their male counterparts is easy. That’s why there isn’t really much of a gap in same profession comparisons. Getting women into more lucrative careers or getting Society to pay more for traditionally women dominated industries is much much harder.
To your question: The wage gap ‘myth’ is the misinterpretation of the statistic to say that women are paid much less for the same work.
The observed differences is due to choices like having babies and choosing different career paths, but for the same job it's objectively illegal to pay female workers less.
The feminists argue by taking the average of all wages, and of course women produce less economic value overall when they're still the primary caregiver in most societies.
The real crime is because the value generated by primary caregivers is not in dollars changing hands, and thus not taxable, no government has any interest in honestly measuring that value. The value of a primary caregiver is massive and it's criminal that we as a civlization have demonized women and men who choose to fill that role.
