That's just something unoriginal people say
Intellectual property is yours while you write, while you speak, while you create.
Your ideas and creations are yours.
If you choose to let people borrow them, they're still yours.
The people that steal them without giving credit, who try to pass them off solely as their own are just pathetic frauds.
It matters to these communities when someone claims to have created Bitcoin
Why not everything else
People will literally preach about owning your content and turn around and say NVM you own nothing
It doesn't make sense
They're just being sheep