Probably because everyone is in it for short term gains and to gain something for themselves. If politicians actually cared about the advancement of the human race, (in any way), they'd join each other towards building common goals until no common goals are left.
I wanna stress, im not in any way supporting authoritarian regimes. But that is one of the very very few advantages of a 1 party system, that the people in charge actually look at the long term impacts, because they will still be in power in 10-20 years. So they cant just bleed the country dry and then hand their mess over to the other party at the next election and have them deal with all the problems you created.
Agreed. Lots of people in the US praised the chinese rapid response to covid and how it was able to staunch the spreads.
But like..they welded people's door shut. They threatened normal citizens with bodily harm my guys. Being "good at covid" was a side effect of their one-party rule that we criticize every other year.
Authoritarianism is highly effective at making things happen, it's just really REALLY bad at human rights violations since anything that gets in the way of the state is an issue.