Why didn't metrics enjoy full rights of citizens?

Metrics, often referring to metric system users or advocates, historically faced resistance due to cultural and political factors. Many countries, particularly the U.S., clung to traditional measurement systems, which created a divide between metric and non-metric users. Additionally, national identity and economic interests played a role, as switching to metrics could have significant implications for industries and education. This reluctance to fully embrace metrics meant that advocates often struggled for recognition and rights in their adoption.