I don't think we really disagree. We should have better laws preventing landowners from restricting access to public land, and we should have laws explicitly allowing things like corner-crossing. But these are mostly issues in areas of public land that border developed areas. Since the vast majority of public land in this country is freely accessible to everyone via public roads that can't be blocked by private landowners, there's never really been enough political will to do large-scale land access reform like they did in the UK.

Again, over 90% of UK land is private, and large land barons control the vast majority of that. We just don't have a similarly widespread issue with land access in the US.