Why? If people really truly deep deep in their hearts, fundamentally disagree about something, why should they continue living together?
Couples break up, roommates move out, people immigrate, empires expand and recede, borders change.
Why must the US be this sea to shining sea empire? It’s not like there is some natural or physical reason.
Why does one border have to be here versus there, it’s arbitrary anyway, it’s changed in the past and it can change again.
For real open source projects, it’s a lot of the time not nerds working for free.
All your favorite frameworks and libraries are often developed in house at big companies (angular, react, vue, tensorflow, Kafka, pytorch, k8s, Jenkins, and many many more).
And even then, much of the development on them is done by people who are getting paid to use the frameworks at smaller companies.
There are tons of examples the other way too of course, but even the Linux kernel is mostly corporate commits, Google, Huawei, Oracle, and others.
This isn’t inherently bad, but it’s not as cut and dry as people make it out to be.
I want to add, that language development is also often done by companies. Today for example is a Mozilla thing, and while a non profit, the devs aren’t working for free.