Given how few people among the general public ever cross paths with copyright law, and how common copyright infringements are in practice (eg posting a photo of

Given how few people among the general public ever cross paths with copyright law, and how common copyright infringements are in practice (eg posting a photo of a movie poster on Instagram or sharing a meme based on a shot from a TV show), I don't find your appeal to social contract very convincing. Many copyright provisions survive only because too few people are affected by them in practice. For example, publishing a photo of Eiffel tower at night is illegal in France, because the illumination is a work of art still under copyright protection. This does not mean universal acceptance of these provisions.