More like: The world doesn't give a shit about what "America" does.
Also, America is a continent and not a country.
Also, America is a continent and not a country.
The author of the piece treated "America" as short-hand for "continental United States", so the title is doubly-wrong in that case, as it doesn't propose that American should have just two time zones.
Your objection seems pointlessly argumentative. The author explains what "world" means:
> My original plan was just for the United States, but there is no reason we can’t take this global, and have only 10 to 12 time zones worldwide.
The OP's response is compatible with this use, which seems to be "all of the people on the world", including those living in the countries you mentioned.
The OP also is obviously incapable of knowing what "the world" gives a shit about.
I guess he's bitter because he can't get a job doing remote RoR work, but obviously nobody in the US would hire him with that attitude.
In reviewing the OP's history now, as it appears that you did, the OP comes from Brazil. Citizens of Brazil, in common with the rest of South America, consider "America" to be both North America and South America.
This is as I suspected earlier.
The result is a pretty standard response for people from South America, enough that guide books for South America will warn "Americans" about the testy response they might get from using that term as a demonym; http://www.usaisnotamerica.com/ chastises people for using that word that way, and going the other way, http://www.slate.com/articles/news_and_politics/a_fine_whine... defends the use.
As the Slate article points out, many South Americans consider the term "American", when used as a synonym for people from the US, is "unfair, imperialistic, and U.S.-centric".
Viewed with that in mind, a proposal by a US citizen for the rest of the world to switch to use fewer time zones, well, that's just rubbing the cultural imperialism right in.
This is a pretty standard culture conflict, where the OP is commenting on a US-centric site, and where you have little knowledge of the broader situation. It doesn't have to have anything to do with remote Ruby on Rails work.
Just like the OP is incapable of knowing what "the world" cares about, you are incapable of knowing that no one in the US is willing to accept that attitude. At the very least, Brazilian ex-pats living in the US likely won't have a problem.