It would be bad if GNU stomped out all other philosophies of developing software and products, because it would remove the commercial incentive to innovate. On the other hand, we'd be much worse off without all the work that its philosophy has produced.
I get your frustration, though - GNU will never be what you want it to be, internally, unless you're 100% on board.
Not so. In a world were the FSF got their way: Organizations with a need for specialized software would be able to contract programmers to bring that software into existence. It's not as though every other profession in the world would throw up their hands and say they couldn't use computers anymore just because software could no longer be copyrighted.
But this is the aim of the FSF, they clearly believe that all software should be copyleft.
Some, even many, people has somehow got it into their heads that the FSF is equally opposed to anything which is not copylefted, and this is decidedly not the case.
Cringe. I will only participate in communities with meaningful codes of conduct.