You've touched on some interesting points here. I have also felt the entitlement, but while contemplating why it exists I came to the conclusion that it is due to a misplaced belief that open-source primarily benefits the individual and as such is a righteous crusade. While individuals may become beneficiaries in particular use-cases, I would argue that it is actually corporations that benefit the most, and not by a small margin. Just think of all that labor they get away with not having to pay for and all that specialized knowledge they don't have hire for. Then they also benefit from publishing libraries to end users so that their platforms may be more deeply integrated in customer's tech stacks. Meanwhile the guy maintaining the various open-source libraries that underpin those commercial services doesn't get anything at all. One might even be able to claim that open-source is predominantly an upwards transfer of wealth from engineers to executives.