There's obviously no consensus that it's positive. It's clearly, very obviously and very badly negative. It's blatantly sexist discrimination against men who have done nothing wrong, which is deeply immoral. It also many other subtle negative effects. It degrades the language and confidence in the rule of law because these laws that make people unequal are invariably presented as "equality" laws. It also makes it impossible to respect women on boards! Everyone knows they might be there only to satisfy a legal quota, not because anyone actually respected their abilities. I've actually heard quite a few women opine that they start out suspicious of women in powerful positions these days, because they know directly how easy it is to get there on the back of feminism, but they need competent services in that moment and not a job. If you want to create anti-female sexism where none should exist, forcibly replacing men for sexist reasons is a great way to do it across the board.