> Does that really help? Even when open-source, it's only a matter of time before an Oracle or Google or Microsoft or Meta takes it over (if they didn't develop it to begin with).

Of course it can help. For example, when Oracle bought MySQL, it was forked and we got Maria. When Emby pissed off people, it was forked and we got Jellyfin. There are plenty of other examples.

Whether or not you like these products, the point is that open source gives the community the ability to continue development if the original project gets bought and/or otherwise changes its philosophy for the worse.