That absolutism sound sexists to me. Some women are awesome in tech, and some are not.
Some women could be awesome but they don’t know it yet.
The field needs more of those awesome women, not because they are women, but because they are awesome.
Basically they’re just supporting women in tech
There are many careers (ones that require you to travel, ones that require lots of in-person onsite availability) that genuinely are really tough for young mothers, and it forces a classic feminism catch-22 on them; namely, an unpleasant need to make a choice between seeking fulfillment via having a career, versus seeking personal fulfillment via motherhood. It's just really unfair that one has to choose and can't just do both.
As it turns out, there are a lot of careers where you can have both with no problem; but there are others that are a bad fit. (For an example of a career that fits this really poorly, take truck driving.)