It is not a universal truth whether or not proprietary or free software makes sense. In a world without copyright, the mechanisms of software profiteering and the utility of open or closed source radically change, since anything and everything is effectively permissively licensed.

On one side, it would take the profit motive out of proprietary software. Without copyright you can not prosecute users who redistribute your binaries, and thus it is "hard" to get people to buy them from you. I would not say impossible because I would not fathom considering all the possibilities in such a foreign context. But in the general case, without copyright, it becomes impossible to profiteer off false scarcity of information in the form of copies of software.

I say that because its important to contextualize why people strive to close off and lock down their software by depriving users of software freedoms - because copyright control, control of distribution, and the right to a monopoly over the idea means profit. If you take that away suddenly there is little incentive not to develop the software you want communally with others who want the same software, because your options are either do all the work yourself closed and have everyone else use it anyway, or open it up and have others contribute and lessen your burden. The mechanism though does not change - if you are distributing your software, which is the only way the GPL even takes effect to compel source release, in a copyright free world it makes more sense to at least release the source as an act of security. Because you cannot even sell visibility - ie, if someone wants to derive from you, you cannot extort them to see the source because if you do take money from them to see it once, you cannot legally compel them not to then release it once you have willfully given them a copy.

In that political paradigm - not a universe, not a fundamental rule of reality - software freedom just makes sense almost all the time. And the edge cases where it does not are much easier to overcome, because today free software is an uphill battle against corporate interests who use their power over software to extort their users of revenue to then fund the enhancement of their product. It is why photoshop and office are so hard to contend with, because they get so much money by using this framework of information monopolies to entrench themselves perpetually.

There are a lot of ways to frame a society that could in theory bias it towards free or proprietary software. which is in part why I don't always agree with RMS - I love the GPL and what it means in our political environment today, but I also claim it is a highly flawed economic model due to the existence of state sponsored IP in the first place. But there are many other ways to do things, and in any of those permutations free software may or may not be economically optimal, and that means it is absolutely simplifying things to claim "universes where free software make sense" exist. That is literally not seeing outside the box at all.