Bhutan has been mining Bitcoin since 2019, but that doesn't mean they're ahead in the race. Other countries and companies are also investing in Bitcoin with different acquisition strategies. The fact that Bhutan has "organic" Bitcoins doesn’t really set them apart from others, as many actors in the market also use sustainable methods. Focusing solely on Bhutan's model without considering the diversity of approaches from other countries is a bit reductive.
Either buying or mining BTC is fine, but it is great and unique that a country is mining their own BTC, and they have been doing so for a long time now. Take note that most countries neither buys nor mine their coins, they acquire it through confiscation and forfeiture, we can all agree that it is unique for a country to get theirs through mining than confiscation.