I think I would put your three reasons in a different order:
1) It's the right thing to do to use fewer resources overall if at all possible
2) It should be cheaper, in the first place to repair rather than replace, particularly for more complex items.
3) Mechanisms ought to be in place to facilitate #2 and that where the 'right to repair' comes in.
My husband spends a fair amount of time looking at repair videos, and it repairability is high on the list of criteria if and when we make a substantial purchase. So we have bookmared ebac for our next washing machine perhaps (
discussed here) although hopefully our Bosche will do a good few years yet! When I buy clothes I am choosing natural materials, and woven ones that will be easier to adjust or patch. Usually I go for longevity over cheapness.