Sure, but as the other user says there are so many filters that the final pool is scarce. So if we assume that men and women tend to be equally qualified (of course they are), but there are more men than women in politics, then by forcing gender parity they are probably ruling out men who were more qualified.
Honestly, we're talking about politicians, it's not like qualifications was a mandatory pre-step and I don't think it's going to change anything. I'm just arguing the previous comment about non-meritocracy.