That's true. Most jobs in the U.S. allow women to do this, and those that don't are unfortunate and should be shunned if possible.
> Additionally the world health organisation recommends breast feeding for two years.
Yes, but the APA in the US recommends 6 months exclusive/at least 1 year. In our case, it was a bit over 1 year for the first child (she wanted to stop), and almost 2 years for the second (had to be weaned, imagine he would have kept going until adolescence had we permitted /s).
A major reason the WHO recommends breast-feeding for two years is because of water quality issues in developing countries. We are fortunate (for the most part) to have water here in the US free of those pathogens that cause early childhood mortality.
EDIT: I'm rate-limited at the moment, but after carefully reading your reply below, I'd say we probably agree on most parts of the issue posed in TFA. However, unless I'm misreading your position, we appear to disagree on the relative fitness of men and women to raise young children (My position: thanks to technology, both men and women in the West are equally capable of raising infants and young children. In my opinion, their fitness for that task depends on the person).