It's another for one to directly lose out on potential sales due to that availability.
This argument is so untrue for books it's not even funny. There is a huge treasure trove of free ebooks available and very often you can get a used mass paperback for less than a dollar. And there's no win from a pirated copy.
Commodities don't get pirated. Commodities get market competition.
If you could 3D-print yourself a copy that looks just like the original, then sure, I'd say it's absolutely right to do. But that's my opinion, I'm not a fan of the concept of intellectual property. Regardless, what you did here is trying to equate piracy with theft, which is incorrect. Copying does not make the original disappear. Copyright infringement may be a crime, but it's a different crime than theft, both legally and morally.
> but reading a specific book and because you can't afford to pay for it, now you think you are entitled to it for free because why?
Well, if I can't afford it, I'm not going to buy it anyway. The publisher loses nothing over me making a copy. And there's an argument to be made that popular works of art are essential, because they form a shared cultural background; not having access to them means being excluded from the discussions your society is having.
It felt good to give Adobe my money, and I am not certain I would have paid for the product today had I not donned my peg-leg and eyepatch growing up.
I think in practice, the moral argument just doesn't work too well for intellectual property, and creators need to deal with it. Which, unsurprisingly, they do, in different ways (be it through making payment convenient like Netflix, prosecuting individuals like MPAA, or focusing on enterprise deals like Adobe, ... or still pushing the moral angle because a statistical effect is better than none).