Blockchain technology opens up many applications for different fields. We can see that technology helps a lot of fields such as education, culture, education ...
Considering voting couldn't be really corrupted with blockchain than it wouldn't really validate any reason for politicians to use. All politicians all around the world would prefer the crooked system we have right now and try to move that to any direction they feel would benefit them the most, without politicians taking advantage of the loopholes the politics will have to become more legit and honest which is not how politicians work.
That is why I honestly feel like even tho blockchain and voting would have been the perfect combo and would make all voting all around the world amazing it still wouldn't be enough to convince politicians and even the people who support the winning parties would want it, they prefer to bully and cheat their way to the top.