I wish somebody could tell me what this means half technically. My mind is wavering between this is a good thing because everyone's connection is becoming secure to not a good thing for reasons unknown.
It seems like you've got it backward. Kazakhstan is not making the internet more secure. They're requiring citizens to install something (their own root security certificate) that compromises the security of https. The result is that their government can eavesdrop on all traffic, encrypted or unencrypted. That's the story anyway.