Because the title of the article is "An open-source maps app that doesn't suck" when it should have been "An open-source maps app that doesn't suck in the US".
There are people on here that don't live in the US, and it's sometimes exhausting to have to add these suffixes in your head by default. You always have to assume that, if the author doesn't specify, they're talking about the US, whereas most of the world doesn't actually live in the US.
I agree 100% with your second paragraph, and understand the frustration, but this isn't an instance of that. From what I've seen online, the most praise for OSM comes from European countries, where it seems to have better data than even the Google/Apple offerings. It has pretty good data here in India too, surprisingly good in some parts, pretty weak in others.
But the main hypothesis holds - out of the many open source maps apps I've tried, Organic Maps is the one that sucks the least, in terms of usability, performance, robustness, etc.
I think there’s a difference between doesn’t suck and rarely makes mistakes. Maps.me works well in Europe. I haven’t tried it in Asia, but I will.
In the meantime, OSM is open source. If you are particularly concerned about non-US performance, perhaps the problem is not with blog authors but with OSS contributions to OSM outside the US?
The person in the comments merely noted that it doesn't work well in Vietnam. Given that this is the internet, and given that the author said it works well without giving a clear location as to where it works well, I think it's safe to say that in this specific instance, "Why did you expect it to work for every single place on the world?" has a simple answer: Because OP said so, in the article.
Nobody here demands that an OSS project works well in every part of the world. What is being criticized here is the US-centric view of the article author, and the original comment merely noted that you can't make a general assumption of suckiness based on one location.
Again, the problem isn't with the app. It's with the way the article assumes everyone reading this lives somewhere where the app doesn't suck.
