I don't believe the people of El Salvador were forced to adopt Bitcoin. They have the option to use their local Fiat as they do with Bitcoin and if you say they they are continually making research to understand Bitcoin more which leads to what is presented in the chat, I'd agree and as for Nigeria, we do know that the Government has not been able to provide the enabling economy for the ever-growing youths to thrive hence the surge into cryptocurrency so no surprise there to see Nigerian on the top of that list.
Bukele may have not directly forced the people but the people or businesses who denied acceptance of bitcoin as payment have obviously been put in huge social pressure since most have agreed into this "new thing." And the reason is because "he himself made a grandiose promise to his citizens that adopting Bitcoin would digitize the economy, decrease dependence on the U.S. dollar, lower remittance fees(which accounts for about 20% of the country’s gross domestic product) and drive investment." With these, people would have more likely had no choice but to follow the crowd either for the hope of a better business return or for the sake of not being singled out by the majority.
And yeah, with the current circumstance of the Nigerian people, they really don't have that much of a choice but to adapt into the changing times or to diversify their methods to make ends meet. It would be nice if the government supported this and made some free seminars to teach the youth about the opportunities that this industry has to offer.