Personally I believe that the rights of users to privacy and freedom are more important then a corporations right to use open source software to make proprietary software. There's a reason why nobody uses FreeBSD and why Linux is the dominant open source operating system.
Because on Linux the vast majority of its users run a complete operating system under the GPL, meanwhile on FreeBSD the vast majority of people use a proprietary dirivitive. Also significantly more companies sponsor Linux and it's not even comparable.
If you think about how many people use proprietary Android by Google, it is exactly comparable.
Comparing numbers is pointless here. Fact is that GPL has more conditions when you're allowed to use and modify the code. More conditions means more restrictions. And this means, less freedom.
It means less freedom for developers but has proved that it provides more freedom for users. Does MacOS have an open source version? No but ChromeOS and Android do (ChromiumOS and ASOP respectively). Even when companies make a proprietary fork of Linux they still contribute massively in terms of code, not just money.
I'm saying that when code is open source it helps the open source ecosystem and when using open source code means contributing your modifications everyone benefits.