You either fail at reading comprehension or you are being dishonest.

Nowhere does the author say we "shouldn't support women becoming software engineers". His argument is simply that women are, on average, less inclined to become software engineers because of innate psychological differences, which explains the unbalanced gender ratio in tech. He suggests we should stop all forms of "positive" discrimination in the form of employment quotas that are aimed to correct the gender imbalance, and instead select individuals based on their merit.