A country is big and complicated with many elements that decide its success or failure, and Bitcoin as a single element, can not change a failed nation to a succesful one. It's unrealistic mission for Bitcoin and Bitcoin does not have that mission when it was created by Satoshi Nakamoto.
It's clickbait trick by politicians or Youtubers or people who want to make noise on social media.
I would normally agree with you but look how El Salvador pulled this. I think it worked for them. They become seriously rich thanks to bitcoin. If some other country tries the same thing (buying lots of btc), I think it will work for them too. Even the US is thinking about building a btc reserve. I don't think that's a coincidence. Bitcoin will make all of its investors rich like it has done before. Bukelele sees it, Saylor sees it, Trump sees it but somehow there are people who still can't see it.
I think the president starting a war against gangs weighted more in helping the country, the money El Salvador put on bitcoin is a lot for a civilian but irrelevant for state proportions, still it's a great marketing gimmick.