Assuming everything is created with profit as a motive is fairly disingenuous. Look at the open software community just for a start. How many person-hours of labour has been put into those alone without profit ever coming into play as a motive? How much profit over how many people has been generated because of that work? Take say linux for example. What is the sheer number of people that have profited off of linux and the insane amount of overall profit generated vs. Linus, the 'original' creator of the kernel? Just to take one very small example. I'm guessing at least to start, and I may be wrong, but Linus probably isn't struggling financially, meanwhile just how many people now make a living off of linux existing?
I imagine anyone would be hard pressed to actually calculate the amount of people that have profited off of linux being available freely, the actual amount of money made by literally everyone that's made money off it being created and distributed the way it has been, without profit being a sole motivator.
It's not the free, hobby stuff that's giving IA trouble. And if you look at what people are consuming the most (games, books, movies, tv shows), they obviously prefer the content made by people trying to make a living, not the free-time hobby projects. The biggest games on Twitch are League of Legends and Fortnite, not The Battle of Wesnoth.
Pointing out that people will make some content for fun doesn't really mean much because a world where we depend on hobby/passion projects is obviously not the optimum. I want someone to profit by making the exact content that I want.
But I would also draw your attention to the fashion industry. Before the 1980s logomania allowed for trademark law to be applied, there was basically zero IP protection on fashion... but it turns out it was a pretty robust industry anyway.
As a society we've gotten pretty hooked on IP law, but I'm pretty convinced we'd all be a lot better off with MUCH much less.