On the point of this dodgy paragraph "Until 1944 it was still possible for women to be barred from the teaching profession if they married. However, today it is men who are more likely to leave the profession."
I agree it definitely doesn't say 'women were more likely to leave the profession in 1944 as they could be barred if they got married, however today it is men who are more likely to leave', so if that was what was meant, it is extremely poorly written.
It also should be noted that the numerically largest group of people leaving the profession is women in their 30s (the time most likely to become mothers).
Therefore the paragraph would be rather more up-to-date if it said 'the largest group of people leaving the profession is women in their 30s, the number of men leaving is much smaller, but a larger proportion of men than women are leaving.'