I disagree. I think because the incremental cost for another copy of some already written software is 0, the perceived value is 0. It's the general problem with copyright IMHO.
It's not like a widget, that there's a value intrinsic to each widget - the value is all in the creating the initial copy of the software and in any ongoing changes people want.
And while for a singular person, perhaps writing FLOSS is charity, but for companies it might well be more payment in kind - i.e. cooperation on making it do things each company wants makes it more valuable for everyone.
It's not like a widget, that there's a value intrinsic to each widget - the value is all in the creating the initial copy of the software and in any ongoing changes people want.
And while for a singular person, perhaps writing FLOSS is charity, but for companies it might well be more payment in kind - i.e. cooperation on making it do things each company wants makes it more valuable for everyone.