I would not say that this is the thing that keeps women out of politics.
That said, I am going to be broadly and enthusiastically supportive of many things that restrict or regulate campaign finance. With regard to the stuff that you're talking about, I would put my general elections hat on and say, sure, regulate that and I would support it. However, is this the thing? Is this the big and formal barrier that's keeping women and visible minorities out? No, it's not. I think that suggesting that this is somehow it is distracting from that 169 number. This is not the excuse. It's just not.