I think a lot of folks use "leftist" in modern usage to mean "those who are further left than liberals". And that's where you're getting a lot of pushback. In terms of governmental regulation "you cannot use the judicial system to compel people to use your preferred avenue of repair" is pretty weak. I think there's a path to saying "there's no legal concept of 'felony contempt of business model'" is anti governmental regulation.

What I'm saying is that by casting right-to-repair as leftist (or rightist) just muddies the waters of what leftism is without providing any guiding context about why people might be for or against the right to repair. In any case, there's very few parts of the governmental-regulation spectrum that are unambiguously left or right.