Facebook serves to mobile phones in third world countries.

In what way does this invalidate what I wrote, which, if I have to make it even plainer, is:

If you're serving to mobile phones in third world countries [and you're concerned with React's size], then you can always NOT use React.

Apparently Facebook is not concerned with that, or doesn't consider it a problem for third world networks.

But for those people that complain about React's size and third world usage, they do know that there are tons of lighterweight options, right?