It's basically wrong in the same way as saying "Im looking for white, heterosexual men who want to speak about Python"
This might be a clumsy solution (promoting people as successful programmer/role models based on considerations other than achievement), but the risk is low (lower the value of PyCon France slightly) and the reward is potentially very large (increase Python's stake in an underutilized labour pool), if the experiment is successful.
That makes sense if you suspect that other people spend a lot of time making women feel unwelcome and that you're going to miss out on some great talks if you don't do anything about it. I don't think it is always unreasonable to suspect something like that.
There are not enough coders presenting over the age of 70. This event is ageist